JP2023151320A - Refill container and double container - Google Patents

Abstract

To provide a refill container and a double container that facilitate replacement that requires dimensional accuracy even for a container body with relatively large dimensional tolerances.SOLUTION: A refill container 1 includes a body part 2 that is accommodated in a space S50 of a container body 50 in a removable manner, and a bottom part 3. The body part 2 is provided with a fixing flange 4 that presses against an inner peripheral surface F51 of the container body 50 all the way around in a state where the body part 2 is accommodated in the space S50.SELECTED DRAWING: Figure 1

Description

The present invention relates to a refill container and a double container.

As a conventional double container, for example, a cosmetic container is known in which a replaceable refill container is attached to a container body (outer container) (see, for example, Patent Document 1). Replacement of the refill container is performed, for example, by using a means of fixing the refill container by fitting it into the outer container by press-fitting or the like, or a means of fixing the refill container by hooking them together, such as undercut fitting.

JP2022-007410A

However, if the container body is made of a material with a relatively large dimensional tolerance (for example, glass), due to the dimensional tolerance, the double container can be replaced by the replacement that requires dimensional accuracy such as the above method. It is difficult to perform refilling.

An object of the present invention is to provide a refill container and a double container that can be easily replaced even with a container body having relatively large dimensional tolerances, which requires dimensional accuracy.

A refill container according to the present invention is a refill container that includes a body portion that is removably housed in a space formed in a container body, and a bottom portion that is connected to the body portion, and the body portion includes: A fixing flange is provided that presses the inner peripheral surface of the container body over the entire circumference when the body is accommodated in the space of the container body.

In the refill container according to the present invention, it is preferable that the fixing flange is a flexible flange that can be deformed and restored.

In the refill container according to the present invention, it is preferable that the body portion is provided with a plurality of the fixing flanges.

In the refill container according to the present invention, a bottom side portion of one side of the body, which is located closer to the bottom than the fixing flange, has a flat shape that is flattened inward in the axial direction. Preferably, the bottom side portion has a convex portion formed by recessing a part of the bottom side portion inward in the axial direction and protruding inward in the axial direction.

In the refill container according to the present invention, the upper end of the body may be formed by a sealing flange for attaching a sealing member that closes an opening formed at the upper end.

A double container according to the present invention includes the refill container described above, and a container body in which a space is formed to removably accommodate the body of the refill container.

According to the present invention, it is possible to provide a refill container and a double container that can be easily replaced even with a container body having a relatively large dimensional tolerance, which requires dimensional accuracy.

1 is a cross-sectional view schematically showing a double container according to an embodiment of the invention, comprising a refill container according to an embodiment of the invention; FIG. FIG. 2 is a plan view from above showing the double container of FIG. 1 with the lid removed. FIG. 2 is a side view schematically showing, partially in section, the double container of FIG. 1 without a refill container attached thereto; FIG. 1 is a side view schematically showing a refill container according to an embodiment of the present invention, partially in cross section. FIG. 5 is a bottom view showing the refill container of FIG. 4 from below. FIG. 5 is a side view schematically showing, partially in section, a state immediately before the refill container shown in FIG. 4 starts to be attached to the container main body shown in FIG. 3; FIG. 5 is a side view schematically showing, partially in section, a state in which the refill container of FIG. 4 has been completely attached to the container main body of FIG. 3; 8 is a side view schematically showing, partially in cross section, an example of a method for checking the remaining amount of contents filled in the refill container of FIG. 4 in the double container of FIG. 7; FIG. 8 is a sectional view schematically showing a state in which the refill container in FIG. 4 is being taken out after the contents filled in the refill container in FIG. 4 are used up in the double container in FIG. 7. FIG.

Hereinafter, a refill container 1 and a double container 10 according to an embodiment of the present invention will be described with reference to the drawings. In the present disclosure, the refill container 1 and the double container 10 can be used as a refill container for cosmetics and a cosmetic container whose content M is cosmetic cream or the like. In the present disclosure, the symbol O10 is the central axis of the double container 10. Moreover, the symbol O1 and the symbol O50 are the central axis of the refill container 1 and the central axis of the container body 50, respectively. In the present disclosure, the refill container 1 is housed in the container body 50 such that the central axis O1 of the refill container 1 is coaxial with the central axis O50 of the container body 50. That is, in the present disclosure, the central axis O10 of the double container 10 is coaxial with the central axis O1 of the refill container 1 and the central axis O50 of the container body 50.

Further, in the present disclosure, a direction extending parallel to the central axis is referred to as an axial direction, and a direction perpendicular to the central axis is referred to as an axial direction. In addition, in the present disclosure, the term "upper" includes, in addition to its usual meaning, the side of the opening of the double container (including the container body and refill container). In addition, in the following description, the term "lower" includes, in addition to its usual meaning, the bottom side of the double container (including the container body and refill container).

<Double container>
In FIG. 1, reference numeral 10 is a double container according to an embodiment of the present invention. The double container 10 is a container body in which a space S50 (hereinafter also referred to as "accommodation space S50 of the container body 50") is formed to removably accommodate a refill container 1 and a body 2 of the refill container 1, which will be described later. It is equipped with 50.

Additionally, in the present disclosure, the double container 10 includes a lid 60. FIG. 2 shows a state in which the lid 60 is removed from the double container 10 from above.

FIG. 3 schematically shows, partially in cross section, the double container 10 without the refill container 1 attached thereto.

In the present disclosure, the container body 50 can be formed of, for example, glass or synthetic resin. In the present disclosure, the container body 50 is formed of glass with large dimensional tolerances. Referring to FIG. 3, in the present disclosure, the container main body 50 includes an opening 51 in which an opening A50 communicating with the accommodation space S50 of the container main body 50 is formed, a shoulder 52 connected to the opening 51, and a shoulder. 52 and a bottom portion 54 that is continuous to the trunk 53.

As shown in FIG. 3, in the present disclosure, the accommodation space S50 of the container body 50 is a hole with a bottom. Specifically, it is a straight hole extending along the central axis O50 of the container body 50. Here, the straight hole refers to a hole formed by a smooth inner circumferential surface F51 having no steps. In the present disclosure, the accommodation space S50 of the container body 50 is formed by a round hole having a diameter D50 (hereinafter also referred to as "inner diameter D50"). Specifically, the accommodation space S50 of the container body 50 is formed by a straight hole having an inner diameter D50 that is the same along the axial direction. However, in the present disclosure, the straight hole is not limited to a hole formed with the same inner diameter D50. In the present disclosure, the straight hole also includes a tapered hole in which the inner diameter D50 decreases toward the bottom 54.

Further, in the present disclosure, the lid 60 is detachably attached to the opening 51 of the container body 50. In the present disclosure, the lid 60 is a screw cap. Specifically, the lid body 60 includes an inner lid 61 that is removably screwed into the mouth portion 51 of the container body 50, a back lid 62 that is attached to the lower surface of the inner lid 61, and an outer lid that covers the inner lid 61. It is equipped with 63 and. The outer cover 63 is fixed to the inner cover 61. The back cover 62 seals the opening A50 of the mouth 51 with the lid 60 attached to the mouth 51 of the container body 50. However, the lid body 60 is not limited to a multilayer screw cap including an inner lid 61 and an outer lid 63 as in the present disclosure. The lid body 60 can be a single-layer screw cap with the outer lid 63 omitted. Moreover, the lid body 60 is not limited to a screw cap as long as it is a cap that can be attached to and detached from the mouth portion 51 of the container body 50.

<Refill container>
FIG. 4 schematically shows a refill container 1 according to an embodiment of the present invention, partially in cross section.

In the present disclosure, the refill container 1 is made of synthetic resin. In the present disclosure, the refill container 1 is a thin refill container. In the present disclosure, the refill container 1 is integrally molded from synthetic resin. Examples of the synthetic resin include polypropylene, polyethylene, and polystyrene. In the present disclosure, polypropylene, which is easier to recycle, is used as the synthetic resin.

The refill container 1 includes a body 2 that is removably housed in a storage space S50 of the container body 50, and a bottom 3 that is connected to the body 2.

Inside the refill container 1, a storage space S1 (hereinafter also referred to as "accommodation space S1 of the refill container 1") that stores the contents M is formed. The storage space S1 of the refill container 1 communicates with the outside world through an opening A1 formed at the upper end of the body 2.

Further, the body portion 2 is provided with a fixing flange 4. As shown in FIG. 1, the fixing flange 4 presses the inner peripheral surface F51 of the container body 50 over the entire circumference when the body 2 is housed in the accommodation space S50 of the container body 50. Thereby, the refill container 1 is fixed to the container body 50 by the fixing flange 4.

In the present disclosure, the fixing flange 4 is a flexible flange that can be deformed and restored. As a result, in the present disclosure, the refill container 1 is more firmly fixed to the container body 50 by the fixing flange 4. In the present disclosure, the fixing flange 4 and the body 2 are made of synthetic resin (polypropylene) that can be deformed and restored.

Further, in the present disclosure, the body portion 2 can be provided with a plurality of fixing flanges 4. In this case, the refill container 1 is firmly fixed to the container body 50 by the fixing flange 4. In this embodiment, the body portion 2 is provided with two fixing flanges: an upper fixing flange 4a and a lower fixing flange 4b. In the present disclosure, the upper fixing flange 4a and the lower fixing flange 4b are arranged at intervals in the axial direction (the direction in which the central axis O1 of the refill container 1 extends).

Furthermore, in the refill container 1, the bottom side portion of one side of the body 2, which is located closer to the bottom 3 than the fixing flange 4, is shaped into a flat shape that is flattened toward the inside in the axial direction. It is.

FIG. 5 shows the refill container 1 from below.

In the present disclosure, "one side of the trunk 2" refers to the front side or the rear side of both the front and back sides when the entire circumference of the trunk 2 is defined as front and back. Alternatively, "one side of the trunk 2" refers to the right side or the left side of the left and right sides when the entire circumference of the trunk 2 is defined as left and right.

Referring to FIG. 5, in the present disclosure, one side of the trunk 2 refers to one side across the boundary line X passing through the central axis O1 as a reference when viewed from the bottom as shown in FIG. or the other side. In the following description, in order to simplify the description, one of the two sides of the trunk 2 will be referred to as the front side 21, and the other one of the sides of the trunk 2 will be referred to as the rear side 22.

In the present disclosure, the torso 2 is defined by two sides, a front side 21 and a rear side 22. Further, referring to FIG. 4, in the present disclosure, the rear side 22 is defined by an opening side portion 22a and a bottom side portion 22b in the axial direction (vertical direction). In this case, the opening side portion 22a of the rear side 22 is a portion of the rear side 22 located on the side of the opening A1 and provided with the fixing flange 4. Further, the bottom side portion 22b of the rear side 22 is a portion of the rear side 22 located closer to the bottom 3 than the opening side portion 22a.

Referring to FIG. 5, in the present disclosure, the outer shape of the opening side portion 22a of the rear side 22, together with the outer shape of the front side 21, is formed by a circle with a diameter D1 centered on the central axis O1 when viewed from the bottom. . That is, the outer shape of the opening side portion of the body portion 2 (the portion where the fixing flange 4 is provided) is circular with a diameter D1. On the other hand, as shown in FIG. 5, the outer shape of the bottom side portion 22b of the rear side 22 has a long axis extending between the two intersections X1 of the boundary line X and the outer shape of the front side 21 when viewed from the bottom. It is formed by a semi-ellipse. In the present disclosure, the outer shape of the bottom side portion 22b of the rear side 22 is concave so as to become flat toward the inside in the axial direction (toward the central axis O1 side) as it goes toward the bottom portion 3. FIG. 4 shows the rear side 22 when the outer shape of the bottom side portion 22b of the rear side 22 is formed by a circle with a diameter D1 centered on the central axis O1, similar to the outer shape of the opening side portion 22a. The outer shape of the bottom side portion 22b is virtually shown by a two-dot chain line. In the present disclosure, the outer shape of the bottom side portion 22b of the rear side 22 is a hypothetical shape indicated by a chain double-dashed line when viewed in a cross section (cross section in FIG. 4) including a boundary bisector Y and a central axis O1, which will be described later. With respect to the outer shape of the bottom side portion 22b of the rear side 22, it is inclined toward the inside in the axis perpendicular direction (toward the central axis O1 side) by an angle α toward the bottom portion 3.

Furthermore, a convex portion 23 is formed on the bottom side portion 22b by recessing a part of the bottom side portion 22b inward in the axial direction and protruding inward in the axial direction. In this case, if the convex part 23 is pressed outward in the axial direction from the accommodation space S1 of the refill container 1, the front side of the refill container 1 (the front side 21 of the body part 2) will face downward, as will be described later. The refill container 1 can be tilted.

Referring to FIG. 2, the convex portion 23 is formed to protrude toward the storage space S1 of the refill container 1. In the present disclosure, the inner surface F23 of the convex portion 23 (the surface of the convex portion 23 on the accommodation space S1 side) is formed by a curved surface that is convex toward the central axis O1 in plan view, as shown in FIG. . In particular, in the present disclosure, the anti-slip portion 24 is provided on the inner surface F23 of the convex portion 23.

Further, in the present disclosure, the convex portion 23 is formed on the boundary bisector Y. In the present disclosure, the boundary bisector Y is a line that passes through the central axis O1 and is orthogonal to the boundary line X in plan view, as shown in FIG. That is, in the present disclosure, the convex portion 23 is formed at the center of the bottom side portion 22b in the left-right direction (extending direction of the boundary line X). In this case, the refill container 1 can be tilted most efficiently by pushing the convex portion 23 from the storage space S1 side.

Further, referring to FIG. 4, in the present disclosure, the upper end of the body 2 is formed by a sealing flange 5 for attaching a sealing member 6 that closes the opening A1 formed at the upper end. The sealing member 6 can be attached to the upper surface of the sealing flange 5 by adhesive or the like. Thereby, the storage space S1 of the refill container 1 can be easily sealed against the outside world. Additionally, in the present disclosure, the sealing member 6 can be removed from the sealing flange 5. Thereby, the accommodation space S1 of the refill container 1 can be opened to the outside world. In the present disclosure, the seal member 6 is provided with a handle 6a. Thereby, the seal member 6 can be easily removed.

Next, an example of how to attach the refill container 1 will be explained. In the following description, the dual container 10 of the present disclosure will be described as being in a state at the time of product shipment, with no refill container 1 attached, as shown in FIG.

Referring to FIG. 3, in this description, the double container 10 is shipped with the storage space S50 of the container body 50 filled with the contents M. Therefore, the user initially opens the lid 60 and takes out the contents M filled in the accommodation space S50 of the container body 50 through the opening A50. That is, the refill container 1 is installed after the content M filled in the storage space S50 of the container body 50 is used up.

FIG. 6 schematically shows, partially in cross section, a state immediately before the refill container 1 starts to be attached to the container main body 50. Further, FIG. 7 schematically shows, partially in cross section, a state in which the refill container 1 has been completely attached to the container main body 50.

As shown in FIG. 6, when installing the refill container 1, the refill container 1 is inserted through the opening A50 of the container body 50. In the present disclosure, the inner diameter D50 of the accommodation space S50 of the container body 50 is the outer diameter of the opening side portion of the body 2 (the portion of the body 2 where the fixing flange 4 is provided) (the opening of the body 2). The outer diameter of the side portion) is larger than D1. That is, in the present disclosure, the body 2 of the refill container 1 does not fit into the inner circumferential surface F51 of the container body 50.

On the other hand, the outer diameter D4 of the fixing flange 4 (outer diameter of the fixing flange) is larger than the inner diameter D50 of the container body 50. Therefore, when the refill container 1 is pushed into the accommodation space S50 of the container main body 50, the refill container 1 can be fixed to the container main body 50, as shown in FIG.

In the present disclosure, pushing of the refill container 1 is limited by the sealing flange 5 of the refill container 1 coming into contact with the upper end of the mouth portion 51 of the container body 50. Further, as shown in FIG. 7, in the present disclosure, when the refill container 1 is fixed to the container main body 50, there is a gap C between the bottom 3 of the refill container 1 and the bottom 54 of the container main body 50. It is formed. That is, in the present disclosure, when the refill container 1 is fixed to the container main body 50, the bottom 3 of the refill container 1 and the bottom 54 of the container main body 50 are not in contact with each other.

In the present disclosure, when using the content M filled in the refill container 1, the user removes the seal member 6 and then takes out the content M through the opening A1 of the refill container 1.

By the way, in the present disclosure, the fixing flange 4 is a flexible flange that can be deformed and restored. In this case, when the refill container 1 is pushed into the accommodation space S50 of the container body 50, the fixing flange 4 is deformed. Due to this deformation, the air in the accommodation space S50 of the container body 50 can be discharged to the outside from between the fixing flange 4 and the inner peripheral surface F51 of the container body 50. Next, when the push-in of the refill container 1 is released, the fixing flange 4 that has been deformed due to the push-in of the refill container 1 attempts to return to its original shape. Due to this restoring operation, the fixing flange 4 and the inner circumferential surface F51 of the container body 50 come into close contact with each other over the entire circumference in the circumferential direction around the central axis O10 of the double container 10. Thereby, in the present disclosure, the refill container 1 is more firmly fixed to the container body 50, as shown in FIG.

Specifically, since the fixing flange 4 and the inner circumferential surface F51 of the container body 50 are in close contact, the gap between the body 2 of the refill container 1 and the inner circumferential surface F51 of the container body 50 is The bottom space ΔS1 is in a sealed state by the fixing flange 4. Therefore, when only the refill container 1 is pulled up from the container main body 50, the bottom space ΔS1 between the body 2 of the refill container 1 and the inner circumferential surface F51 of the container main body 50 is in a reduced pressure state. Therefore, in the present disclosure, even if an attempt is made to pull up only the refill container 1 from the container body 50, only the refill container 1 will not be easily removed. In this way, according to the refill container 1 according to the present disclosure, the refill container 1 can be more firmly fixed to the container body 50, as shown in FIG.

Furthermore, in the present disclosure, the body portion 2 is provided with two fixing flanges 4, an upper fixing flange 4a and a lower fixing flange 4b. In this case, the inter-flange space ΔS2 between the body 2 of the refill container 1 and the inner peripheral surface F51 of the container body 50 is in a sealed state by the upper fixing flange 4a and the lower fixing flange 4b. Therefore, when only the refill container 1 is pulled up from the container main body 50, the inter-flange space ΔS2 between the body 2 of the refill container 1 and the inner circumferential surface F51 of the container main body 50 is also in a reduced pressure state. Therefore, as in the present disclosure, if a plurality of fixing flanges 4 are provided on the body 2, even if only the refill container 1 is to be pulled up from the container main body 50, the refill container 1 will be more firmly attached to the container main body 50. Can be firmly fixed.

Next, an example of a method for removing the refill container 1 will be described.

FIG. 8 schematically shows, partially in cross section, an example of a method for checking the remaining amount of content M filled in the refill container 1 in the double container 10 of FIG. 7. Further, FIG. 9 schematically shows a state in which the refill container 1 is being taken out after the content M filled in the refill container 1 is used up in the double container 10 of FIG. 7. There is.

In the latter half of the use of the refill container 1, as shown in FIG. 8, the remaining amount of the content M can be confirmed by the user's visual observation of the convex portion 23 or by the tactile sensation of the user's fingers. For example, the upper end 23a of the convex portion 23 is set at a position where it is exposed from the content M when the content becomes half or less of the total content of the content M. In this case, the convex portion 23 serves as a signal that the amount of contents M is less than half of the total amount and that there is little left. That is, the convex portion 23 can perform a warning function to notify that the amount of contents M is low.

Next, when replacing the refill container 1, as shown in FIG. 9, the bottom portion 22b of the rear side 22 of the body 2 is pressed against the inner circumferential surface F51 of the container body 50. In the present disclosure, as shown in FIG. 9, the user presses the anti-slip portion 24 provided on the inner surface F23 of the convex portion 23 to the outside in the axial direction (toward the inner circumferential surface F51 side of the container body 50). Thereby, the bottom side portion 22b of the rear side 22 of the body 2 can be pressed against the inner circumferential surface F51 of the container body 50.

Here, in the present disclosure, as described with reference to FIG. 4, the rear side 22 of the body 2 approaches the central axis O1 as the bottom side portion 22b moves toward the bottom 3 with respect to the opening side portion 22a. It is tilted by an angle α so that Therefore, as shown in FIG. 9, when the bottom side portion 22b of the rear side 22 of the body 2 is pressed against the inner circumferential surface F51 of the container body 50, the refill container 1 is moved toward the front side within the accommodation space S50 of the container body 50. tilts downward by an angle α toward At this time, as shown in FIG. 9, a gap C1 is created between the lower fixing flange 4b and the inner circumferential surface F51 of the container body 50 on the front side 21 of the body 2, and on the rear side 22 of the body 2, , a gap C2 is created between the upper fixing flange 4a and the inner peripheral surface F51 of the container body 50. That is, at this time, the bottom space ΔS1 communicates with the outside world via the inter-flange space ΔS2. As a result, the reduced pressure state in the bottom space ΔS1 and the inter-flange space ΔS2 is eliminated as the bottom space ΔS1 and the inter-flange space ΔS2 communicate with the outside world. Therefore, by sliding the refill container 1 upward along the inner peripheral surface F51 of the container main body 50, the refill container 1 can be easily removed from the container main body 50.

As in the present disclosure, the bottom side portion (22b) of one side (22) of the body portion 2 is shaped into a flat shape that is flattened toward the inside in the axial direction, and the bottom side portion ( By forming the convex portion (23) on 22b), as mentioned above, during use, it is possible to perform a warning function to notify that the amount of content M is low, while at the same time, after use, This helps in easily removing the refill container 1 from the container body 50. However, the body 2 of the refill container 1 may be circular with the same diameter D1 along the axial direction, including the entire opening side portion and bottom side portion. can. That is, as in the present disclosure, the torso 2 has a shape in which the front side 21 and the rear side 22 are asymmetrical in plan view (bottom view), as well as a shape in which the front side 21 and the rear side 22 are symmetrical. It also includes those that become.

A new refill container 1 can be attached to the container body 50 by removing the used refill container 1 and then performing the operations described with reference to FIGS. 6 and 7. In this way, by using the refill container 1, it is possible to easily replace the container main body 50, which requires dimensional accuracy, even with a relatively large dimensional tolerance.

Therefore, according to the present invention, it is possible to provide the refill container 1 and the double container 10, which can be easily replaced even with a container main body 50 having a relatively large dimensional tolerance, which requires dimensional accuracy. Note that the double container 10 of the present disclosure may be in a state in which the refill container 1 is attached at the time of product shipment. Further, according to the present invention, the container body 50 can be used as is. This eliminates the need to newly manufacture the container body 50. In addition, resources can be saved by eliminating the need to newly manufacture the container body 50.

Although the container with a lid and the method of replacing the container with a lid according to an embodiment of the present invention have been described above, the present invention is not limited to the above embodiment, and is not limited to the scope of the claims. Various changes can be made within the specified range. For example, the container body 50 can be formed of synthetic resin as described above. Further, according to the present invention, the mouth portion 51 of the container body 50 can be omitted. In this case, the refill container 1 is provided with an opening (51) that is omitted from the container body 50. Further, as described above, it is preferable that there be a plurality of fixing flanges 4 of the refill container 1, but the number is not limited to this, and it is sufficient if there is at least one. Furthermore, in the present disclosure, the refill container 1 and the double container 10 are not limited to cosmetics. Moreover, the content M is not limited to a cream-like content. For example, the content M can be solid, powdered, or liquid.

1: Refill container, 2: Body of refill container, 21: Front side of body (one side of body), 22: Rear side of body (one side of body), 22a: Opening on rear side of body Side part, 22b: Rear bottom side part of body part, 23: Convex part, 24: Anti-slip part, 3: Bottom of refill container, 4: Fixing flange, 4a: Upper fixing flange, 4b: Lower fixing 5: Seal flange, 6: Seal member, 50: Container body, 51: Mouth of container body, 52: Shoulder of container body, 53: Body of container body, 54: Bottom of container body, A1: Opening of the refill container, A50: Opening of the mouth in the container body, α: Angle, D1: Diameter of the body of the refill container (outer diameter of the opening side of the body of the refill container), D50: Inner diameter of container body, F23: Inner surface of convex part, F51: Inner peripheral surface of container body, M: Contents, О1: Center axis of refill container, О10: Center axis of double container, О50: Center axis of container body , S1: Accommodation space of refill container, S50: Accommodation space of container body, ΔS1: Bottom space, ΔS2: Space between flanges, X: Boundary line, Y: Boundary bisector

Claims (6)

A refill container, comprising a body part that is removably housed in a space formed in a container body, and a bottom part that is connected to the body part,
A refill container, wherein the body is provided with a fixing flange that presses the inner peripheral surface of the container body over the entire circumference when the body is housed in the space of the container body. The refill container according to claim 1, wherein the fixing flange is a flexible flange that can be deformed and restored. The refill container according to claim 1 or 2, wherein the body is provided with a plurality of the fixing flanges. A bottom side portion of one side of the body portion located closer to the bottom than the fixing flange is shaped into a flat shape that is flattened toward the inside in the axial direction,
4. The bottom side portion has a convex portion formed by recessing a part of the bottom side portion inward in the direction perpendicular to the axis and protruding inward in the direction perpendicular to the axis. Refill containers listed in . 5. The refill container according to claim 1, wherein the upper end of the body is formed by a sealing flange for attaching a sealing member that closes an opening formed at the upper end. A double container comprising the refill container according to any one of claims 1 to 5, and a container body having a space for removably accommodating the body of the refill container.