JP7014533B2 - Beverages packed in microwave ovens and how to sell them - Google Patents

Description

The present invention relates to a containerized beverage for heating in a microwave oven that can be heated in a microwave oven, and a method for selling this beverage in a store.

With the diversification of foods in recent years, various types of bento boxes and prepared foods are sold at convenience stores and supermarkets, and purchasers of these products often purchase packaged beverages together.
By the way, products such as bento boxes and prepared foods are generally heated in the store by a clerk or a purchaser using a microwave oven installed in the store so that they can be eaten in a warm state. However, with regard to packaged beverages, they are not heated in the microwave oven in the store, and the packaged beverages stored and displayed in the normal temperature state, refrigerated state or heated state in the store are purchased and taken home as they are. Is common.

Recently, at convenience stores, packaged beverages such as packaged green tea beverages and containerized coffee beverages are stored and displayed in a heated state in the store using a hot plate type hot warmer and sold. Is increasing.
However, if it is stored for a long period of time at a high temperature of 55 ° C. or higher, deterioration of the beverage components is unavoidable even for green tea beverages, so that the functionality and flavor are deteriorated due to the change of the components. I had a problem. Therefore, it was common for retailers to manage the heating period maintained at 55 ° C. or higher so that the heating period does not become longer than a certain level. However, the labor and cost of management have been a heavy burden on the store side.

Considering the above points, if the store clerk or the purchaser can heat the packaged beverage using the microwave oven installed in the store, the purchaser can reach the desired temperature regardless of the season. On the other hand, it is not necessary for the store to use a hot warmer to store and display the product in a heated state in the store, which causes the problem of heat deterioration. Not only will it disappear, but product management can be performed more efficiently.

By the way, the technology for providing a packaged beverage that can be sold by heating is not intended for heating in a microwave oven, but is stored and sold at a high temperature (50 to 70 ° C.), for example. Regarding the packaged beverage for hot sale, a new genre of the containerized beverage for warm sale is disclosed, which gives a new taste such as a feeling of warmth while making the best use of the flavor of the packaged beverage (Patent Document 1).

Further, a disposable liquid beverage container having a glass container portion, which can be heated by a microwave oven while being sealed, and which can be carried after heating is disclosed (Patent Document 2).

Japanese Unexamined Patent Publication No. 2017-0000060 Japanese Patent Application Laid-Open No. 2003-182756

As described above, with respect to the packaged beverage, if the clerk or the purchaser can heat the beverage using the microwave oven installed in the store, there is a merit for both the purchaser and the store side.
Compared with a general hot plate type hot warmer, the microwave oven heats the entire beverage liquid at the same time, so that the heating efficiency is good and uniform heating is possible. However, when a general packaged beverage is heated as it is, the beverage is suddenly boiled, part of it becomes very hot, part of it is not heated, and uniform heating is sufficiently guaranteed. I had a problem that it wasn't done.

INDUSTRIAL APPLICABILITY According to the present invention, when a beverage is heated using a microwave oven installed in a store, it is possible to suppress bumping of the beverage, and the beverage can be uniformly heated. At the same time as proposing, the method of selling the beverage is also proposed.

The present invention is a container-filled beverage for heating a microwave oven that can be heated by a microwave, and the beverage container of the packaged beverage has a lid and a container body, and the container body is a cylindrical bottle. The average diameter b of the inner body of the container of the cylindrical body is 60 mm to 75 mm, and the ratio (a / b) of the vertical dimension a in the container of the main body of the container to the average diameter b of the inner body of the container is 2. It is 0 to 3.2, and the bottom of the container body is provided with a recess recessed toward the inside of the upper body, and the height from the bottom of the bottom to the top of the recess in the container body (“concave depth”). (Also also referred to as) w is 8 mm to 20 mm, and the containered beverage is a liquid liquid having a viscosity of 1.5 mPa · s to 2.5 mPa · s. suggest.

The present invention also displays the microwave oven-heating container-filled beverage in a state of maintaining 0 to 35 ° C. in the store, while heating the microwave oven-heating container-filled beverage in the store. We propose a method for selling packaged beverages for heating microwave ovens, which is characterized by installing a microwave oven.

The packaged beverage for heating in a microwave oven proposed by the present invention defines the diameter b of the cylindrical body of the beverage container, the aspect-to-length ratio a / b, and the recess depth w at the bottom of the container body, and also defines the depth w of the beverage liquid. By defining the viscosity, it is possible to suppress the sudden boiling of the beverage when it is heated using a microwave oven, and it is possible to uniformly heat the beverage.

Therefore, while the above-mentioned packaged beverages are displayed in the store while being maintained at 0 to 35 ° C., the inside of the store is equipped with a microwave oven for heating the containerized beverage for heating the microwave oven. In the above, the purchaser or the clerk can heat the product to a desired temperature using a microwave oven, which enables very efficient sales. Moreover, as a seller, not only does it eliminate the need to prepare products in multiple temperature ranges in advance, but it also eliminates the need to store them in a heated state for a long period of time, so it is necessary to control the temperature to prevent product deterioration. You can enjoy the merit of disappearing. Further, by using a microwave oven, it is possible to easily heat the product to an arbitrary temperature according to the customer's preference, so that it is possible to provide a product that more meets the customer's needs.

It is a figure which showed the schematic sectional view of the container body which is an example of embodiment of this invention.

Hereinafter, an example of the embodiment of the present invention will be described in detail. However, the present invention is not limited to the following embodiments.

[Beverage in this container]
The packaged beverage according to an example of the embodiment of the present invention (hereinafter, also referred to as “the present packaged beverage”) is a container-packed beverage for heating a microwave oven that can be heated by a microwave oven, and is packaged in a container. A beverage container (also referred to as "this container") for a beverage is a packaged beverage having a lid and a container body, filling the container body with the beverage, and closing and sealing the lid.

<Book container>
This container is provided with a lid and a container body as described above.

As shown in FIG. 1, the container body has a cylindrical bottle shape, and the upper end portion of the body portion having a cylindrical shape with a bottom surface is narrowed to have a neck portion and an opening portion.
The container body can be provided with irregularities such as ribs having an appropriate shape at appropriate locations.

The ratio of the vertical dimension a in the container of the container body to the average diameter b of the body inside the container (a / b) from the viewpoint that the body of the container can be heated uniformly when heated by a microwave oven. However, it is preferably 2.0 to 3.2, and more preferably 2.1 or more or 2.7 or less, and more preferably 2.2 or more or 2.4 or less.

Here, the "vertical dimension a" is, as shown in FIG. 1, the vertical dimension in the container of the container body (also referred to as "vertical dimension in the container body"), that is, the container from the bottom to the opening of the container body. It means the inner height.
On the other hand, as shown in FIG. 1, the "average diameter b of the inner body of the container" means the horizontal dimension of the narrowest portion of the body, that is, the diameter b1, and the horizontal dimension of the widest portion of the body, that is, the diameter b2. It means the average value (= (b1 + b2) / 2).

The average diameter b of the inner body of the container in the container is preferably 60 mm to 75 mm, and more than 65 mm or more, from the viewpoint that the body of the container can be uniformly heated when heated in a microwave oven. It is more preferably 75 mm or less, and more preferably 68 mm or more or 73 mm or less.

As shown in FIG. 1, the bottom of the container body has a recess that is recessed toward the upper part of the body when the container body is viewed from the lower side, that is, the bottom side, in other words, a recess that bulges toward the upper part of the body when viewed from the side surface side. It is preferable to have a convex portion. By providing such a recess at the bottom, convection of the beverage can be generated in the container when the beverage is heated in the microwave oven, and the beverage can be heated even more uniformly.
The shape of the concave portion may be a trapezoidal shape as shown in FIG. 1, a circularly curved shape in an arc shape, a triangular shape, or the like when the container body is viewed in a vertical cross section. It may be in the shape of, and ribs may be formed.

The depth w of the bottom recess, in other words, the height w from the bottom of the bottom to the top of the recess in the container body can be heated more uniformly when heated in a microwave oven. , 8 mm to 20 mm, more preferably 10 mm or more or 15 mm or less, and more preferably 11 mm or more or 13 mm or less.

Further, from the viewpoint that the heating can be performed more uniformly when heated in a microwave oven, the ratio (w / a) of the depth w of the bottom recess to the vertical dimension a inside the container body is 0.040 to 0.200. It is preferably 0.060 or more or 0.150 or less, and more preferably 0.080 or more or 0.100 or less.

The wall thickness of the body of the container is not easily deformed when heated in a microwave oven, but it is preferably as thin as possible from the viewpoint of cost. Therefore, it is preferably 180 μm to 350 μm, and above all, 185 μm or more or 330 μm. Hereinafter, among them, it is more preferably 190 μm or more or 320 μm or less.

The beverage container of the packaged beverage is preferably made of non-metal and synthetic resin because it is heated in a microwave oven. Examples of the material of the beverage container include polyethylene terephthalate (referred to as “PET”), polypropylene, polyethylene and the like. Of these, polyethylene terephthalate (PET) is preferable.
From the viewpoint of heat resistance, for example, it is preferable that at least the opening to the neck of the beverage container is formed of crystallized PET.
A part of the container body may be made of a different material.

The packaged beverage preferably has a structure in which a plastic film (referred to as a "label") is coated on the outer periphery of the container body.
The label is provided with a strip-shaped window portion in the vertical direction that allows the capacity of the beverage existing in the bottle container body to be visually recognized, and is located along the window portion according to the capacity of the beverage existing in the bottle container body. It is preferable to have a configuration in which the output of the microwave oven and the guideline for the heating time are displayed. With such a configuration, the capacity of the beverage existing in the bottle container body is confirmed in the window portion, the output and the heating time according to the capacity of the beverage are set in the microwave oven, and the lid body. By heating with the lid removed, it is possible to heat safely in a microwave oven.

<Beverage>
The beverage of the present packaged beverage is preferably a so-called RTD (Ready to Drink) type beverage that can be drunk as it is. Above all, considering the pressure resistance of the container, it is preferable to use a non-carbonated beverage in which the internal pressure of the container does not easily increase.
Examples of non-carbonated beverages include tea beverages such as green tea, roasted tea, oolong tea, black tea, and jasmine tea, and beverages such as barley tea, coffee, and cocoa.

The beverage of the packaged beverage is preferably a liquid having a viscosity of 1.5 mPa · s to 2.5 mPa · s from the viewpoint of suppressing bumping during heating, and above all, 1.5 mPa · s or more or 2. It is more preferable that the liquid is 3 mPa · s or less, particularly 1.5 mPa · s or more or 2.0 mPa · s or less.

Among them, the beverage of the packaged beverage is preferably a tea-based beverage, and particularly preferably a green tea beverage.
When a green tea beverage is drunk at a cold temperature of about 5 ° C. for the purpose of depletion, a sharp flavor is required. On the other hand, in the case of so-called "Chibidara-drinking", which is drinking during meals or preferentially drinking, an astringent flavor is required. From this point of view, it is preferable to adjust catechins and ester-type catechins as an index of bitterness and astringency factors, and to adjust the solid content concentration derived from tea as an index of drinking response during drinking.
From this point of view, the green tea beverage as the beverage of the present packaged beverage preferably contains catechins at a concentration of 20 to 90 (mg / 100 g), particularly 30 mg / 100 g or more or 85 mg / 100 g or less. Above all, it is more preferably 40 mg / 100 g or more or 80 mg / 100 g or less.
The "catechins" are catechin (C), epicatechin (EC), galocatechin (GC), epigalocatechin (EGC), catechin gallate (Cg), epicatechin gallate (ECg), galocatechin gallate (GCg). ), Eight kinds of catechins of epigallocatechin gallate (EGCg), and the concentration of catechins indicates the total content of these.

Further, when the green tea beverage is drunk at a temperature of about 40 to 60 ° C., the bitterness and astringency tends to be less likely to be felt as compared with the case where the green tea beverage is drunk in a cold state, so that the bitterness and astringency are required. Therefore, among the catechins, epigallocatechin gallate, which has a strong bitterness and a high content, and gallocatechin gallate, which changes from epigallocatechin gallate when heated, are used as indicators as the next beverage in this packaged beverage. It can be said that the green tea beverage of catechin is particularly preferable.
That is, it is preferable that the green tea beverage has a ratio of the total content of epigallocatechin gallate and gallocatechin gallate to the content of the above catechins of 0.29 to 0.70, particularly 0.36 or more or 0.60. Hereinafter, among them, it is more preferably 0.40 or more or 0.50 or less.

Further, when the green tea beverage is drunk at a temperature of about 40 to 60 ° C., a response to drinking is required as compared with the case where the green tea beverage is drunk in a cold state. From this point of view, the green tea beverage preferably has a tea-derived soluble solid content concentration of 150 to 500 mg / 100 g, particularly 200 mg / 100 g or more or 450 mg / 100 g or less, and among them 250 mg / 100 g or more or 400 mg / 100 g or less. Is more preferable.
The "soluble solids derived from tea" are soluble solids obtained from directly extracted tea leaves, tea extracts concentrated according to a conventional method after extracting tea leaves, and dried powdered tea dried according to a conventional method. It shows the soluble solid content obtained from the tea extract, and the soluble solid content obtained from the tea extract or dried powdered tea recovered by selecting only a specific component after extracting the tea leaves.

Further, when the pectin concentration in the green tea beverage is high, it becomes difficult to feel the bitterness and astringency, and it tends to be unsatisfactory especially when drinking hot. Therefore, from this viewpoint, the green tea beverage has a pectin concentration of 0.001 to 0.010 wt%. It is preferably a green tea beverage, and more preferably 0.001 wt% or more or 0.008 wt% or less, and more preferably 0.002 wt% or more or 0.006 wt% or less.

The green tea beverage is preferably a green tea beverage having an oxalic acid concentration of 1.0 to 10.0 mg / 100 g, particularly 2.0 mg / 100 g or more or 8.0 mg / 100 g or less, and among them 3.0 mg / 100 g or more or It is more preferably 7.0 mg / 100 g or less.
When drinking a green tea beverage at a temperature of about 40 to 60 ° C., if the oxalic acid concentration is 1.0 mg / 100 g or more, it is preferable that the taste is tight, while if it is 10 mg / 100 g or less, it is preferable. It is preferable because it can suppress the astringent taste.

<Relationship between containers and filled beverages>
From the viewpoint of suppressing bumping when the beverage is heated in a container, the beverage liquid amount VL (mL) of the beverage filled in the container and the volume Hv of the head space in the container (Hv). mL) and the internal pressure Hp of the headspace (kPa, based on 1 atm at 20 ° C.) preferably satisfy the following formula 1.
If the relationship satisfies the following formula 1, not only can bumping be suppressed when the lid is heated in a microwave oven with the lid closed, but also the liquid level drops when the lid is opened, so that the lid It is also possible to suppress bumping when heating with a microwave oven in the open state.
(Equation 1) ... -0.720 ≤ (Hv / VL) x Hp ≤ -0.060

Above all, it is more preferable to satisfy the following formula (2).
(Equation 2) ... -0.600 ≦ (Hv / VL) × Hp ≦ -0.100

Among them, it is more preferable to satisfy the following formula (3).
(Equation 3) ... −0.500 ≦ (Hv / VL) × Hp ≦ −0.200

The volume Hv of the head space is preferably 5.0 mL to 15.0 mL, and more than 5.5 mL or 12. It is more preferably 0 mL or less, and more preferably 6.0 mL or more or 10.0 mL or less.

The internal pressure Hp of the headspace (based on 1 atm at 20 ° C.) can more reliably suppress bumping when heated in a microwave oven with the lid closed, and with the lid open. From the viewpoint that bumping when heated in a microwave oven can be further suppressed as described above, it is preferably -20.0 kPa to -6.0 kPa, and above all, -18.0 kPa or more or -8.0 kPa. Hereinafter, among them, it is more preferably -16.0 kPa or more or -10.0 kPa or less.

Further, the ratio (Hv / VL) of the volume Hv of the head space to the content VL of the beverage container is 0.010 to 0 from the viewpoint that bumping when heated in a microwave oven can be more reliably suppressed. It is preferably 0.036 or more, more preferably 0.014 or more or 0.031 or less, and further preferably 0.018 or more or 0.026 or less.

<Beverage filling method>
As a method for sterilizing a beverage and filling a container, a conventional method may be adopted under the sterilization conditions stipulated in the Food Sanitation Law. For example, in the case of plastic bottled beverages (PET bottled beverages), the contents are sterilized at a high temperature, filled at the same temperature and cooled by hot pack filling, and the sterilized contents are placed in a sterilized container at room temperature in a sterile environment. Ase boutique filling and other filling methods can be adopted.
It is particularly preferable to adopt a hot pack filling method to adjust the internal pressure of the head space to a negative pressure with respect to the atmospheric pressure so that the liquid level drops when the lid is opened.

[Book sales method]
In the method for selling a packaged beverage for heating in a microwave oven according to an example of the embodiment of the present invention (hereinafter, also referred to as “the present sales method”), the above-mentioned packaged beverage was maintained at 0 to 35 ° C. in the store. While displaying in a state, it is a selling method characterized by installing a microwave oven for heating the container-filled beverage for heating the microwave oven in the store.

(display)
If the packaged beverage is displayed in the store at a temperature of 0 to 35 ° C., the purchaser or the seller can heat the beverage to a temperature of the purchaser's preference by using a microwave oven.
Examples of the method of displaying in a store while maintaining 0 to 35 ° C. include a method of storing and displaying in a refrigerating case while maintaining 0 to 10 ° C. Further, a method of storing and displaying on a product shelf or the like in a state of normal temperature without heating or cooling, that is, a state of 10 to 35 ° C., so-called normal temperature display, can also be mentioned.

(Heating in the microwave)
The microwave oven preferably does not have a turntable. As a result of the test by the present inventor, it was found that the beverage can be heated more uniformly by heating in a microwave oven without a turntable than in a microwave oven equipped with a turntable.
Further, it is preferable that the microwave oven can be heated in an upright state so that the beverage can be heated in an open state with the lid removed.

The microwave oven preferably has an output of 500 W or more, and more preferably 1000 to 1900 W. The output of 1000 W or more is higher than that of microwave ovens sold as general household appliances, and it can be heated to the temperature desired by consumers at retail stores within 150 seconds, resulting in sales efficiency. Above preferred.
Further, the microwave oven preferably has a heating time of 5 to 150 seconds, and above all, the setting can be freely changed within 20 to 60 seconds from the viewpoint of being able to heat to a desired temperature. Is preferable.

It is preferable that the microwave oven can heat the packaged beverage within 150 seconds from the start of heating, particularly within 60 seconds, from 5 ° C. to 99 ° C.
It is possible to set a low temperature range of 5 ° C or higher, including cases where products sold at ice temperature are slightly warmed, and products sold in the chilled temperature range are warmed to room temperature. It is a thing.

The target temperature for heating the packaged beverage is generally preferably in the temperature range of 40 ° C to 99 ° C. This is because if the temperature is lower than 40 ° C, the warmth of a heated beverage cannot be sufficiently felt when drinking, and if the temperature is higher than 99 ° C, it becomes difficult for the internal solution to maintain a liquid state.
From this point of view, the target temperature for heating the packaged beverage is preferably 45 to 75 ° C., particularly 48 ° C. or higher or 70 ° C. or lower, 50 ° C. or higher or 65 ° C. or lower, and 55 ° C. or higher or higher. It is more preferably 60 ° C. or lower.

The microwave oven preferably has a display unit that shows the correspondence between the heating target temperature of the beverage and the heating time of the microwave oven.

(Heating method)
The above-mentioned packaged beverage can be heated in the store by a clerk or a purchaser using a microwave oven installed in the store with the lid on or with the lid removed and opened. ..
At this time, by adjusting the heating time, it is possible to heat the temperature according to the preference of the purchaser.

[Explanation of words]
When expressed as "X to Y" (X and Y are arbitrary numbers) in the present specification, they mean "X or more and Y or less" and "preferably larger than X" or "preferably Y". It also includes the meaning of "smaller".
Further, when expressed as "X or more" (X is an arbitrary number) or "Y or less" (Y is an arbitrary number), it means "preferably larger than X" or "preferably less than Y". Including intention.

Hereinafter, it will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to these examples.

<Example 1>
A PET bottle container as shown in FIG. 1, that is, a container body having a neck and an opening in which the upper end of a cylindrical body having a bottom surface is narrowed is filled with a green tea beverage by a hot pack to form a container. A stuffed green tea beverage (sample) was obtained. Details are shown in Tables 1 and 2.

The vertical dimension a in the container of the container body is 136 mm, the wall thickness of the container body is 0.30 mm, the average diameter b of the inner body of the container in the container body is 66 mm, and the average diameter of the inner body of the container with respect to the vertical dimension a in the container body. The ratio of b (a / b) was 2.06.
The bottom of the container body is provided with a recess that is recessed toward the upper part of the body when the container body is viewed from the lower side, that is, the bottom side, and the height from the bottom of the bottom to the top of the recess in the container body. w was 12 mm.

The viscosity of the green tea beverage filled in the container (measurement temperature 5 ° C.) is 1.6 mPa · s, contains catechins at a concentration of 84.8 mg / 100 g, and epigallocatechin gallate and gallocatechin in the catechins. The percentage of total content of gallate was 0.44.
The amount of catechins can be appropriately adjusted by those skilled in the art by changing the amount of tea leaves used and the extraction temperature.
The viscosity can be adjusted by increasing the concentration of the tea extract, but it can also be adjusted by adding a thickener such as pectin or carrageenan.

The drinking liquid amount VL of the beverage filled in the container is 280 mL, the volume Hv (mL) of the head space in the container is 7.0 mL, and the internal pressure Hp of the head space (20 ° C., 1 atm standard). Was -15.0 kPa. That is, Hv / VL = 0.025 and (Hv / VL) × Hp = −0.38.

<Examples 2 to 12>
A containerized green tea beverage (sample) was obtained in the same manner as in Example 1 except that the container and filling state of Example 1 were changed as shown in Table 1 and the beverage composition of Example 1 was changed as shown in Table 2. ..

<Comparative Examples 1 to 10>
A containerized green tea beverage (sample) was obtained in the same manner as in Example 1 except that the container and filling state of Example 1 were changed as shown in Table 3 and the beverage composition of Example 1 was changed as shown in Table 4. ..

<Microwave heating and evaluation>
The containerized green tea beverages (samples) obtained in Examples 1 to 12 and Comparative Examples 1 to 10 are shown in Tables 5 and 6 below in a state where the lid is closed or the lid is opened using a microwave oven. The mixture was heated under the conditions shown, and the heating efficiency and uniformity during heating were evaluated.

(Microwave heating)
The following two types of microwave ovens were used.
On the other hand, the microwave oven (Panasonic NE-1801 for business use) does not have a turntable, has internal dimensions of 330 mm x 310 mm x 175 mm, can be set to an output of at least 500 W to 1800 W, and has a heating time. Was freely changeable at any time. In this microwave oven, for example, the microwave oven-heated packaged beverage of Example 1 could be heated to 43 ° C. within 60 seconds from the start of heating.
The other microwave oven (DMWP-96W manufactured by Daewoo Electronics Japan) is equipped with a turntable, has internal dimensions of 290 mm x 306 mm x 220 mm, an output of 600 W, and the heating time can be freely set and changed at any time. there were. This microwave oven was capable of heating, for example, the container-filled beverage for heating the microwave oven of Example 12 to 43 ° C. within 60 seconds from the start of heating.

(Evaluation of heating efficiency)
The temperature of the beverage liquid before heating and the temperature after stirring the beverage liquid in the container after heating (heating temperature at the time of mixing in the table) were measured, respectively, and the heating efficiency (° C / sec) was calculated from the following formula. ..
Equation: (Temperature of drinking liquid after stirring after heating-Temperature of drinking liquid before heating) (° C) / Heating time (seconds)

The larger the value of heating efficiency (° C / sec), the better the heating efficiency can be evaluated. Therefore, the points were evaluated as follows and shown in the table.
1: Heating efficiency (° C / sec) is 0 to less than 0.3 2: Heating efficiency (° C / sec) is 0.3 to less than 0.6 3: Heating efficiency (° C / sec) is 0.6 or more

(Evaluation of temperature uniformity during heating)
The temperature of the drinking liquid at a height of about 2 cm from the liquid level in the container and about 1 cm from the bottom of the container body was measured using a commercially available digital thermometer (O-207 manufactured by Dritech), and the upper part of the container and the container were measured, respectively. The temperature of the drinking liquid at the bottom was used.

After the measurement, the temperature difference (° C) between the upper part of the container and the lower part of the container was calculated, and the temperature uniformity was evaluated as a point as follows. At this time, it can be evaluated that the smaller the temperature difference, the more uniformly the heating can be performed.
1: Temperature difference between the upper part of the container and the lower part of the container (° C) 5 ° C or more 2: Temperature difference between the upper part of the container and the lower part of the container (° C) 3-4 ° C
3: Temperature difference between the upper part of the container and the lower part of the container (° C) 2 ° C or less

(Comprehensive evaluation)
The points for evaluating the heating efficiency and the points for evaluating the temperature uniformity during heating were totaled and comprehensively evaluated as follows.
Total 5-6: Pass Total 2-4, or heating efficiency evaluation points or temperature uniformity evaluation points including 1: Fail

(Discussion)
From the comparison of the above Examples and Comparative Examples and the test results conducted by the inventor so far, the average diameter b of the inner body of the container of the container body is 60 mm to 75 mm, and the container with respect to the average diameter b of the inner body of the container. When the ratio (a / b) of the vertical dimension a in the container of the main body is 2.0 to 3.2 and the depth w of the recess at the bottom of the container main body is 8 mm to 20 mm, the heating efficiency and heating uniformity Was found to be good. Therefore, a packaged green beverage that meets these requirements can be uniformly heated to a predetermined temperature in a short time, and is suitable for a sales form in which the customer heats the beverage to a desired temperature in a microwave oven after purchase. Can be thought of as.

<Comparative Examples 11 to 12 and Examples 13 to 20>
A containerized green tea beverage (sample) was obtained in the same manner as in Example 1 except that the container and filling state of Example 1 were changed as shown in Table 7 and the beverage composition of Example 1 was changed as shown in Table 8. ..

<Microwave heating and evaluation>
The packaged green tea beverages (samples) obtained in Comparative Examples 11 to 12 and Examples 13 to 20 were heated in a microwave oven with the lid closed under the conditions shown in Table 9 below for sensory evaluation. Was done.

(Microwave heating)
The microwave oven used (Panasonic NE-1801 for business use) does not have a turntable, has internal dimensions of 330 mm x 310 mm x 175 mm, can be set to an output of at least 500 W to 1800 W, and has a heating time. Was freely changeable at any time. This microwave oven was capable of heating, for example, the container-filled beverage for heating the microwave oven of Example 1 to 43 ° C. within 60 seconds from the start of heating.

(Compatibility when drinking between meals)
Five inspectors performed a sensory evaluation on the compatibility of the packaged beverage after microwave heating as described above during inter-meal drinking according to the following criteria. If the bitterness is within a certain range, the sweetness of the rice will be enhanced, resulting in a high score. It can be considered that the bitterness and astringency is mainly influenced by epigallocatechin in catechins.
3: There is moderate bitterness, and the sweetness of the rice is strongly felt or stands out.
2: There is less bitterness and the sweetness of the rice feels weak, or there is less bitterness and the sweetness of the rice feels weak.
1: The bitterness is too strong and the sweetness of the rice feels weak.

(Sharpness of aftertaste after drinking)
Five inspectors performed a sensory evaluation on the sharpness of the aftertaste after drinking the packaged beverage after heating in the microwave oven as described above according to the following criteria. When the viscosity is within a predetermined range, it can be considered that the aftertaste is sharp and the score is high.
3: The aftertaste is sharp.
2: The sharpness of the aftertaste is a little good.
1: The aftertaste is not sharp.

(Comprehensive evaluation)
The points for evaluating the compatibility during drinking between meals and the points for evaluating the sharpness of the aftertaste after drinking were totaled and comprehensively evaluated as follows.
Total 4 to 6: Pass Total 2 to 3, or 1 in the evaluation of compatibility when drinking between meals or 1 in the evaluation of sharpness of aftertaste: Fail

(Discussion)
From the comparison of the above Examples and Comparative Examples and the test results conducted by the inventor so far, the beverage has a viscosity of 1.5 mPa · s to 2.5 mPa · s while satisfying the requirements of the container body. For example, it was found that when the beverage is heated using a microwave oven, the beverage can be prevented from bumping and the beverage can be heated uniformly.
Further, from the results of Examples 13 to 20, when the composition of the green tea beverage as the content liquid satisfies the predetermined requirements, the aftertaste is sharp even in a warm state, and the compatibility when eating with rice is good. It turned out that we could provide green tea beverages.

Claims (5)

It is a beverage in a container for heating in a microwave oven that can be heated in a microwave oven.
A beverage container for a packaged beverage has a lid and a container body, and the container body has a cylindrical bottle shape, and the average diameter b of the inner body of the container of the cylindrical body is 60 mm to 75 mm, and the inside of the container. The ratio (a / b) of the vertical dimension a in the container of the container body to the average diameter b of the body is 2.0 to 3.2, and the bottom of the container body has a recess recessed toward the inside of the upper body. The height w from the bottom of the bottom to the top of the recess in the container body is 8 mm to 20 mm.
The beverage of the packaged beverage is a packaged beverage for heating in a microwave oven, which is a liquid having a viscosity of 1.5 mPa · s to 2.5 mPa · s. The beverage container for a microwave oven heating according to claim 1, wherein the beverage container of the packaged beverage is a polyethylene terephthalate container. The beverage for a microwave oven according to claim 1 or 2, wherein the beverage of the packaged beverage is a green tea beverage. The green tea beverage contains catechins at a concentration of 20 to 90 (mg / 100 g), and the ratio of the total content of gallocatechin gallate and gallocatechin gallate to the content of the catechins is 0.29 to 0. The beverage in a container for heating a microwave oven according to claim 3, wherein the beverage is a green tea beverage of .70. It is a method of heating a packaged beverage in a microwave oven, which can uniformly heat the beverage when the packaged beverage is heated in a microwave oven.
The beverage container of the packaged beverage has a lid and a container body, the container body has a cylindrical bottle shape, and the average diameter b of the inner body of the container of the cylindrical body is 60 mm to 75 mm. The ratio (a / b) of the vertical dimension a in the container of the container body to the average diameter b of the inner body is 2.0 to 3.2, and the bottom of the container body has a recess recessed toward the inside of the upper body. The height w from the bottom of the bottom to the top of the recess in the container body is 8 mm to 20 mm.
A method for heating a packaged beverage in a microwave oven, wherein the beverage of the packaged beverage is a liquid having a viscosity of 1.5 mPa · s to 2.5 mPa · s.

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