WO2014022869A1

WO2014022869A1 - Container with fill level monitoring

Info

Publication number: WO2014022869A1
Application number: PCT/AT2013/050111
Authority: WO
Inventors: Gernot Schmid
Original assignee: Seibersdorf Labor Gmbh
Priority date: 2012-08-06
Filing date: 2013-05-24
Publication date: 2014-02-13
Also published as: AT512401A4; AT512401B1

Abstract

The invention relates to a container (1), preferably for liquids, particularly a bottle, comprising a transponder chip (2) and also an antenna (3) that is connected to the transponder chip (2). The invention provides for two flat electrodes (41, 42) that are electromagnetically coupled to the antenna (3) to be arranged on spaced-apart surface regions or wall regions of the container (1) such that the capacitor (4) created by the two flat electrodes (41, 42) has different capacitance values when the container (1) is filled with a predetermined fluid (7) and when the container (1) is unfilled, as a result of which a predetermined fill level for the container (1) prompts the resonant circuit created by the antenna (3) and the capacitor (4), and also if necessary further existent capacitances and inductances, to have a resonant frequency that corresponds to a predetermined, particularly the preferred, communication frequency of the transponder chip (2) and that this resonant circuit has a resonant frequency that differs from this predetermined, particularly the preferred, communication frequency at least in the event of a fill level for the container (1) that differs therefrom, and thereby brings about attenuation, particularly between -20 dB and -100 dB, of the waves sent or received by the transponder chip (2) and particularly suppresses wireless communication by the transponder chip (2) with an external data communication appliance.

Description

Container with fill level monitoring

The invention relates to a container according to the preamble of claim 1. In known containers, especially beverage containers and bottles, there is a need in the art to make information regarding the respective product accessible to the user after the respective bottle is opened and the in the Bottle contained liquid was at least partially removed from this bottle. A common way to do this is with known bottles in printing information, such as winning codes, on the inside of the bottle cap.

In particular, in known bottles it is also possible to print certain information on the inside of labels when the liquid filled in the bottle is opaque and the label can not be detached from the bottle without destroying it. In this case, information from the user of the bottle can only be viewed when the bottle is empty at least so far. that the label is visible on the inside of the bottle. For this purpose, it is imperative that the bottle is emptied so far that the inner area of the label is visible. While such a procedure is usually ensured that the bottle must be purchased before the information printed on the inside information, it is, however, a significant problem is that such an information transfer to the buyer of the bottle is only possible for transparent spoons or beverage containers , in which opaque liquid is filled. Quite generally, an information transfer to the user of a bottle, the contents of which was partially emptied, not readily possible, in particular, in all the above procedures, a systematic information transfer only ever from the product or the product container to the user possible. However, there is no possibility for the user to transfer information to the product container and store it for later use.

It is therefore an objective object of the invention to provide a container in which a wireless electronic transmission of information stored in the container or container information to the user and / or a wireless electronic transmission or storage of information from the user to or on the container is only possible if at least a portion of the liquid in the container has been emptied from this. Conversely, for advertising purposes, it may also be desired that the respective user obtains information about a product _" in the present case, a drink only if this drink has not yet been sold and is therefore still filled with original material.

Thus, it is also an object of the invention to enable wireless electronic communication and the storage of information only if there is an amount of liquid within the container that exceeds a predetermined threshold.

The invention solves these objects in a container of the aforementioned type with the characterizing Merkmai of claim 1.

According to the invention are in a container, preferably for liquids, in particular bottle, comprising a transponder chip and an antenna connected to the transponder chip, two electromagnetically coupled to the antenna

Fioe electrodes are provided which have two surface electrodes which are electromagnetically coupled to the antenna and which are arranged on mutually exposed surface regions or wall regions of the container in such a way that the capacitor produced by the two surface electrodes has capacitance values deviating from one another with a given fluid and with unfilled container at a given level of the container by the antenna and the capacitor, and if any other available capacitances and inductances, first-tuned resonant circuit has a resonant frequency corresponding to a predetermined, in particular the preferred, communication frequency of the transponder chip and that this resonant circuit in at least one of them Level of the container one of these predetermined, in particular the preferred, communication frequency deviating resonant frequency and thereby a Dämpfun g, in particular between -20 dB and -100 dB, causes the waves emitted or received from the transponder chip and in particular suppresses wireless communication of the transponder chip with an external data communication device. This creates a simple possibility, depending on the level of a given Flüssigkeif in the container to allow wireless communication with a transponder chip or to prevent them. In this way, depending on the vote of the transponder chip, sowoh be achieved so that when filled container communication is prevented and communication is made possible with emptied container. Conversely, the Invention but also that with emptied container communication is prevented and communication is possible with a filled container.

A preferred aspect of the invention, which allows communication only with a filled container, provides that when the container is completely filled with the fluid, the resonant circuit created by the antenna and capacitor, as well as all other capacitors and inductors present in the assembly, has a resonant frequency has, which corresponds to the predetermined, in particular the preferred, communication frequency of the transponder chip, and that this resonant circuit with emptied container has a resonant frequency deviating from this resonant frequency at which an attenuation, in particular between -20 dB and - 100 dB, emitted by the transponder or received waves.

A preferred aspect of the invention, with which a communication is made possible only with a container emptied, provides that when the container is emptied, the resonant circuit created by the antenna and the capacitor and all faiis by further available capacitances and inductances has a resonant frequency which is corresponds to the preferred communication frequency of the transponder chip, and that this resonant circuit in completely filled with the fluid container has a resonant frequency deviating from this resonant frequency, in which an attenuation, in particular between -20 dB and -100 dB, of the transponder emitted or received received parts.

In order to enable a simple loading of existing containers with a transponder chip, the antenna and the surface electrodes, it can be provided that the transponder chip, the antenna and the surface electrodes are arranged on a label, in particular an adhesive label, preferably with a paper carrier Wall, preferably on the outer wall, the container is arranged or fixed, in particular glued.

In order to achieve a particularly high deviation of the capacitance and thus a particularly large detuning of the resonant frequency and a secure establishment or inhibition of the communication, it can be provided that the finned electrodes are arranged on mutually opposite regions of the wall of the container.

A particularly large detuning can be achieved by the container having a rotationally symmetrical with respect to a predetermined axis outer shape, wherein the finned electrodes face each other at the same height with respect to the axis and at circumferentially opposite positions, the label being arranged, in particular glued, along the circumference along the outer wall of the container.

Likewise, a particularly strong detuning can be achieved if the label has the form of a strip, in particular an adhesive strip, at the ends of each of the Fiächenelektroden are arranged, wherein the antenna is arranged in the intermediate region between the surface electrodes on the label.

In order to enable a particularly simple implementation of the invention, provision may be made for the fioion electrodes and the antenna not to be connected electrically conductively and / or to be coupled exclusively capacitively and / or inductively. In order to avoid that by a simple tilting of the container, due to the existing in the container in the original closed state air, for the production or inhibiting the communication sufficiently large change in capacity can be caused, it can be provided that the surface electrodes in Circumferential direction of the container are arranged at opposite positions at the same height with respect to the longitudinal axis of the container, wherein of the Fiächenelektroden together at least 10%, in particular between 10% and 30%, the Behälterum.fangs are enclosed.

In order to allow a particularly strong detuning of the resonant frequency or a particularly good capacitive coupling of the two fin electrodes, it can be provided that at least one of the fin electrodes, in particular both fin electrodes, the antenna over a length of at least 5 mm at a distance of less than 0, 1 mm opposite each other. A particularly simple construction results when the antenna has a number of turns arranged along the circumference of a rectangle, the transponder chip preferably being arranged in the region between the windings of the antenna, and / or the finned electrodes being rectangular, the two opposite sides, in particular the shorter sides, of the rectangle created by the antenna in each case rest on one side of the surface electrodes. Advantageously, the container may be filled with a fluid, in particular water, or an aqueous solution, in particular a beverage.

In order to avoid an electromagnetic coupling of the surface electrodes or the antenna with the container, it can be provided that the body of the container consists of electrically non-conductive material.

Several preferred embodiments of the invention will be described in detail with reference to the following drawing figures.

Fig. 1 shows a preferred embodiment of the invention of a container according to the invention, which is filled to the usual extent. Fig. 2 shows the container shown in Fig. 1 in teilentleertem state. Fig. 3 shows an adhesive label on which two electrodes, an antenna and a transponder chip are arranged. 4 shows an electrical equivalent circuit diagram of the antenna arrangement created by the beverage bottle. Fig. 5 shows the effect of detuning the resonant circuit by filling or emptying the bottle in the first embodiment of the invention. Figs. 6-8 show the effects of detuning in further embodiments of the invention.

In Fig. 1, an embodiment of a container 1 according to the invention is shown, which is filled up to the region of its upper edge with a liquid 7, in the present case with a beverage 7. The container 1, in the present case a bottle 1, usually has an opening element 8 in the upper area, which in the present case is designed as a screw closure 6. Of course, the container 1 may also be deviatingly sealed, such as with a Kronverschluss or a cork closure.

In the middle region, approximately halfway up the bottle 1, a label 5 is glued, on which two surface electrodes 41, 42, an antenna 3 and a transponder chip 2 are arranged. The label 5 is strip-shaped in the present case and has on the side not shown in FIG. 3, ie on its back facing the bottle 1, an adhesive layer with which the Kiebeetikett 5 is bonded to the bottle 1. The back side of the adhesive trade piece 5 is glued on the outside of the bottle 1. Alternatively, if this is possible in terms of manufacturing technology, the label 5 can also be glued to the inside of the bottle 1 or be integrated in the bottle wall, which has the advantage that the label 5 can not be easily solved or removed from the Fiasche 1.

The length of the strip forming the label 5 corresponds to about 55% to 60% of the circumference of the flap 1. The two surface electrodes 41, 42 are arranged at the two ends of the respective label 5 and lie opposite each other due to the arrangement of the label 5 along the circumference of the outer shape of the Fiasche 1 at this. The bottle 1 is rotationally symmetrical in the present case and has a rotationally symmetrical outer shape. The surface electrodes 41, 42 are arranged at the same height with respect to the axis of rotation and are located at mutually circumferentially opposite positions. Viewed in the circumferential direction, cover the two Flächeneieselektroden at least 10%, in the present embodiment 20% of the total circumference of the Fiasche 1 from, Of course, the Behäiter 1 may have a non-rotationally symmetrical shape, for example be cuboid or cubic or otherwise have an irregular shape.

The antenna 3 is connected to a transponder chip 2 (FIG. 3) and serves this as an antenna 3 for receiving a communication with an external data communication device, not shown in the figures. Such a data communication device may, for example, be a mobile telephone on which a communication device is provided for receiving an NFC or RFID communication and on which a software is operated with which the content of the information stored in the transponder chip 2 is read out and / or information on the transponder chip 2 can be stored.

The transponder chip 2 may contain different types of information, such as a coded URL, immediate product information, advertising, etc., and raffle participation codes.

3, the two surface electrodes 41, 42 are arranged in the two end regions of the strip-shaped adhesive label 5 in the same plane as the antenna 3 and are each rectangular in shape. The antenna 3 and the surface electrodes 41, 42 do not overlap each other in the view shown in FIG. In principle, any other geometric shapes for the surface electrodes 41, 42 are possible. Furthermore, embodiments are possible in which the antenna. 3 and the fathead friezes 41, 42 in different planes of the adhesive label 5 and, in a view according to FIG. 3, are arranged overlapping each other.

The Fiächenelektroden 41, 42 are coupled or coupled electromagnetically to the antenna 3, wherein electromagnetic coupling or coupling here an explicit electrically conductive connection but also a capacitive and / or inductive coupling is understood.

An equivalent circuit diagram of the adhesive label 5 shown in FIG. 3 is shown in more detail in FIG. 4 shows the transponder chip 2 and the antenna 3 connected to the transponder chip 2, which has an inductance L _A. As a result of the formation of the lines, the antenna 3 also has a parallel capacitance C _A. In addition, the transponder chip 2 also has an input capacitance C _T. By this specific arrangement of the transponder chip 2 and the antenna 3, a resonant circuit is formed which has a resonant frequency f _R. The transponder chip 2 has a preferred or optimal communication frequency f _T , which should correspond to the production of an optimal communication of the resonant frequency of the resonant circuit f _R. At most, the tuning circuit, more tuning, not shown, which are for example parallel to the transponder chip 2, are inserted. Typically, the resonant frequency f _{R of} the resonant circuit and the optimal communication frequency f _{T of} the transponder chip 2 in NFC applications are in the range of approximately 13.56 MHz. As a result, a proper communication of the transponder chip 2 is made possible with an external data communication device. The transponder chip 2 used is an NFC-grain-compatible transponder chip according to IS014443 or ISO 15893, which requires a resonance frequency in the range of approximately 13.56 MHz for the transmission of messages. The resonant frequency f _R is set by concrete selection of an antenna 3 or by selection of the inductance L _A and parallel capacitance C _{A of} the antenna 3, taking into account all other, possibly parasitic present in the transponder, relevant capacitances and inductances, so that data communication between the transponder chip 2 and the external data communication device is enabled.

For this purpose, for example, a tuning capacitor or a tuning capacity GABST is inserted into the resonant circuit, so that the resonant frequency f _{R of} the resonant circuit corresponds to the optimum communication frequency f _T. In the following four variants of embodiments are shown in more detail, all of which, as mentioned above, are formed, but their respective resonant circuits are tuned differently. In the first embodiment of the invention, data communication with an external data communication device is enabled when the bottle 1 is deflated or the level of the liquid 7 in the bottle 1 is below the area electrodes 41, 42. However, data communication is inhibited or suppressed when the bottle 1 is full or when the level of the liquid 7 in the bottle 1 is above the area electrodes 41, 42.

The tuning capacity GABST of the tuning capacitor is set in this embodiment such that the resonant circuit has a resonant frequency f _R , which corresponds to the optimum communication frequency f for the transponder 2 sufficiently well when the bottle 1 is emptied. In this vote, consideration is taken that an additional, parallel to the transponder chip 2 and the antenna 3 located capacitor 4 is inserted with a capacity of C _T UNE in the resonant circuit by the two with the antenna 3 electromagnetically coupled surface electrodes 41, 42 between whose electrodes are air.

If the bottle 1 is filled with liquid 7, the capacitance C _T U _N E = about 0.2 pF of the capacitor 4 increases to a value C UNE ~ about 15 pF and the resonant frequency of the resonant circuit accordingly drops to a value f _R ' from. Correspondingly, as shown in FIG. 5, with the arrow F, the resonance frequency f _R decreases from f _T = 13.56 MHz to f _T '= approx. 12.5 MHz.

When emptying the bottle 1, the liquid 7 located in the intermediate region between the surface electrodes 41, 42 is replaced by air, so that the capacitance C _{TUNE of} the capacitor 4, as shown in FIG. 5 with the arrow L, returns to the original value and the resonant frequency f _{R of} the resonant circuit after emptying is again at the optimum communication frequency of the transponder 2 of f _T = 13.56 MHz.

Data communication between the transponder chip 2 and an external data communication device is again possible only after emptying, since the transmission quality Q shown in FIG. 5 is sufficient for data transmission only after emptying. In a second embodiment of the invention soii communication with the external data communication device only be possible when the bottle 1 is filled. With empty bottle 1 or if the level of the liquid 7 is below the Fiächenelektroden 41, 42, so !! a communication with the external data communication device can be suppressed.

The specific tuning of the resonant circuit is made for the case of a filled bottle 1. The inductance L _{A of} the antenna 3, the capacitance C _{A of} the antenna 3 and the input capacitance Gr of the transponder chip 2, taking into account aiier further, possibly parasitic existing in the transponder, relevant capacitances and inductors are set so that the resonant frequency f _{R of} the created so Resonant circuit of Kommunikaiionsfrequenz the transponder chip 2 sufficiently well.

Additionally or alternatively, in turn, a tuning capacitor with a

Tuning capacity GABST be switched parallel to the resonant circuit to adjust the resonant frequency. In this embodiment, the respective components of the resonant circuit are set or chosen such that the resonant circuit has a resonant frequency f _R , which corresponds to the optimum communication frequency f _T for the transponder chip 2 when the bottle 1 is beffüiit.

In this vote, consideration is taken that an additional parallel to the transponder chip 2 and the antenna 3 located capacitor 4 is inserted with a capacitance of C _TUN E in the resonant circuit by the two with the antenna 3 electromagnetically coupled surface electrodes 41, 42 between whose electrodes, the liquid 7 is located.

If the bottle 1 is emptied with liquid 7, the capacity C _T UNE = about 15 pF of the capacitor 4 drops to a value CVUNE = about 0.2 pF due to the reduced permittivity of the air compared to the permittivity of the liquid 7. The resonant frequency of the resonant circuit accordingly increases to a value f _R '. Accordingly, as shown in Fig. 6, with the arrow L, the resonance frequency f _R of f _T = 13.58 MHz increases to f _T "= 14.6 MHz.

When refilling the bottle 1, the air in the intermediate region between the fioe electrodes 41, 42 is replaced by liquid 7, so that the Capacitance CTUNE of the capacitor 4, as shown in Fig. 6 _» with the arrow F, back to the original value and the resonant frequency f of the resonant circuit after filling again at the optimal Komrnunikationsfrequenz the transponder 2 of f _T = 13.56 MHz

Data communication between the transponder 2 and an external data communication device is possible only when the container 1 is full, since the transmission quality Q shown in FIG. 6 is sufficient only for a data transmission in the operable state.

There is a possibility that the change of the capacity caused by the filling or emptying of the bottle 1 is insufficient to detune a resonant circuit from its optimum communication frequency f _T such that communication with an external data communication device becomes impossible. In this case, it may be advantageous to detune the resonant circuit in advance by varying the resonant frequency f _R , in particular by varying the tuning capacitance, so that even a small additional detuning is sufficient to effectively prevent a communication. Furthermore, for this purpose, namely a deliberately induced reduction of the transmission quality in advance, the electrical conductivity of the interconnects forming the antenna 3 can additionally be reduced. This increases the resistive losses in the antenna and reduces the energy available for data communication.

In a third embodiment ü h ru ngsf orm, which substantially corresponds to the first embodiment, the respective resonant circuit is not at the predetermined from the transponder chip 2 optimal communication frequency operated f _T, but decreased at a relative to the optimal communication frequency f _T communication frequency f _T i, in which a communication can just take place (Fig. 7). The transmission quality Q achieved at the reduced communication frequency f _T i is sufficient for data communication and exceeds the threshold value Q _T of the communication required for carrying out data communication.

An additional increase in the capacitance C _T UNE of the capacitor 4 of the resonant circuit, which is caused by the filling of the bottle 1, leads to a further reduction of the resonance frequency to a value f _T1 (FIG. 7, arrow F) and leads to a decrease the transmission quaity Q unier the threshold Q _T and thus that a communication is impossible at all.

When setting the resonance frequency f _T i of the resonant circuit in the depleted state, a resonant frequency is gradually reduced until a communication is no longer possible. Subsequently, the last previously used resonant frequency f _R , in which communication was still possible, is selected as the resonant frequency fn of the resonant circuit in the depleted state. In this advantageous embodiment, the frequencies f _T, f _T1, f _n as defined or chosen follows:

f _T = 13.58 MHz; i _T i = 13.2 MHz; f _T i = 12.5 MHz;

In a fourth embodiment, which substantially corresponds to the second embodiment, the respective resonant circuit is not operated at the predetermined by the transponder chip 2 optimal communication frequency f _T , but at a relation to the optimal communication frequency f _T increased communication frequency frz, in which a communication is still taking place can (Fig. 8). The transmission quality Q achieved at the increased communication frequency f _T1 is sufficient for data communication and exceeds the threshold value Q _T of the communication required for carrying out data communication.

An additional reduction of the capacitance CJUNE of the capacitor 4 of the resonant circuit, which is caused by the emptying of the bottle 1, leads to a further increase of the resonant frequency to a value f _T2 (FIG. 8, arrow L) and to a decrease of the transmission quality Q below the threshold Q _r and therefore that communication becomes impossible at all.

When setting the resonant frequency f _{T2 of} the resonant circuit in the filled state, a resonant frequency is increased gradually until a communication is no longer possible. Subsequently, the last previously used resonant frequency, at which a communication was still possible, as the resonant frequency f _T2 of

Oscillating circuit selected in the depleted state. In this advantageous embodiment, the frequencies f _T , f _T2 , f _T2 are set or selected as follows:

fr = 13.56 MHz; f _T2 = 13.9 MHz; f _T2 = 14.6 MHz;

Claims

Patent claims:

1 . Container (1), preferably for liquids, in particular a bottle, comprising a transponder chip (2) and an antenna (3) connected to the transponder chip (2), characterized by

two surface electrodes (41, 42) electromagnetically coupled to the antenna (3), which are arranged on spaced apart surface areas or wall areas of the container (1) in such a way that the capacitor (4) created by the two surface electrodes (41, 42) at with A container (1) filled with a predetermined fluid (7) and with an unfilled container (1) have different capacitance values, so that at a predetermined filling level of the container (1) the through the antenna (3) and the capacitor (4), and if necessary further existing capacitances and inductances, the resonant circuit created has a resonance frequency which corresponds to a predetermined, in particular the preferred, communication frequency of the transponder chip (2) and that this resonant circuit has a predetermined, in particular the preferred, level at at least one filling level of the container (1) that deviates from this , communication frequency has a different resonance frequency and thereby causes attenuation, in particular between -20 dB and -100 dB, of the waves emitted or received by the transponder chip (2) and in particular suppresses wireless communication of the transponder chip (2) with an external data communication device,

2. Container (1) according to claim 1, characterized in that the position and / or shape and / or size of the surface electrodes (41, 42) is selected such that

- that when the container (1) is completely filled with the fluid (7), the resonant circuit created by the antenna (3) and the capacitor (4), as well as all other capacitances and inductances present in the arrangement, has a resonance frequency that is the predetermined, in particular corresponds to the preferred communication frequency of the transponder chip (2), and

- That this resonant circuit has a resonance frequency that deviates from this resonance frequency when the container (1) is empty, at which there is an attenuation, in particular between -20 dB and -100 dB, of the signals emitted or received by the transponder.

3. Container (1) according to one of the preceding claims, characterized in that the position and / or shape and / or size of the surface electrodes (41, 42) is selected such that - that when the container (1) is emptied, the resonant circuit created by the antenna (3) and the capacitor (4), and if necessary by other existing capacitances and inductors, has a resonance frequency which corresponds to the preferred communication frequency of the transponder chip (2), and

- that when the container (1) is completely filled with the fluid (7), this resonant circuit has a resonance frequency that deviates from this resonance frequency and at which there is attenuation, in particular between -20 dB and -100 dB, of the waves emitted or received by the transponder,

4, container according to one of the preceding claims, characterized in that the transponder chip (2), the antenna (3) and the surface electrodes (41, 42) on a label (5), in particular an adhesive label (5), preferably with a paper carrier , are arranged, which is arranged or attached, in particular glued, to the wall, preferably on the outer wall, of the container (1).

5. Container according to one of the preceding claims, characterized in that the surface electrodes (41, 42} are arranged on opposite areas of the wall of the container.

6, container according to one of the preceding claims, characterized in that the container (1) is rotationally symmetrical with respect to a predetermined axis

Has an outer shape, the surface electrodes (41, 42) lying opposite one another at the same height with respect to the axis and at circumferentially opposite positions,

wherein the label (5) is arranged, in particular glued, along the circumference along the outer wall of the container.

7. Container according to one of the preceding claims, characterized in that the label (5) has the shape of a strip, in particular an adhesive strip, at the ends of which the surface electrodes (41, 42) are arranged, the antenna (3) being in the Intermediate area between the surface electrodes (41, 42) is arranged on the label (5).

8. Container according to one of the preceding claims, characterized in that the surface electrodes (41, 42) and the antenna (3) are not connected in an electrically conductive manner and/or are coupled exclusively capacitively and/or inductively.

9. Container according to one of the preceding claims, characterized in that the surface electrodes (41, 42) are arranged in the circumferential direction of the container at opposite positions at the same height with respect to the longitudinal axis of the container,

wherein at least 10%, in particular between 10% and 30%, of the container circumference are enclosed by the surface electrodes (41, 42).

10. Container according to one of the preceding claims, characterized in that at least one of the surface electrodes (41, 42), in particular both surface electrodes

(41, 42), the antenna (3) is opposite each other over a length of at least 5 mm at a distance of less than 0.1 mm.

1 1. Container (1) according to one of the preceding claims, characterized in that the antenna (3) has a number of turns arranged along the circumference of a rectangle, the transponder chip (2) preferably in the area between the turns of the antenna (3 ) is arranged, and/or

that the surface electrodes (41, 42) are rectangular, with the two opposite sides, in particular the shorter sides, of the rectangle created by the antenna (3) each on one side of the surface electrodes _. (41, 42).

12. Container (1) according to one of the preceding claims, characterized in that the container is filled with the fluid (7), in particular with water or an aqueous solution, in particular with a drink.

13. Container (1) according to one of the preceding claims, characterized in that the body of the container (1) consists of electrically non-conductive material.