Patent Publication Number: US-2022211210-A1

Title: Temperature-control module for controlling the temperature of baby food, pouch for storing baby food, and method for controlling the temperature of baby food

Description:
The present invention relates to a tempering module for tempering baby food, a bag for storing baby food, and a process for tempering baby food. 
     In order to have baby food available on the go, parents usually need to carry a variety of utensils to be able to make baby food for the baby as needed. Typically, a thermos of boiled water is carried, and the water must be cooled to a comfortable drinking temperature before use. In some cases, the boiled water has already cooled too far, making it too cold for the baby. Alternatively, bottles of special baby water, pre-made milk or breast milk can be taken, but these are not heated to a drinking temperature. In all cases, it is difficult or not possible to have the liquid at the appropriate drinking temperature for the baby when it is needed. 
     Furthermore, thermos flasks and plastic containers in which the powder (baby food concentrate) for the baby food is carried represent open systems. There is therefore a risk of contamination. In other words, both the water and the powder for the baby food can only be stored in these systems to a limited extent. 
     In addition, parents must carry baby bottles with nipple attachments to be able to feed the food to the baby. However, the baby bottles and nipple attachments must be cleaned and sterilized after use. For example sterilization specifically requires a stove to boil the bottles. However, a stove is usually difficult to find when travelling. In addition, cleaning and sterilizing is time-consuming. 
     All this means a lot of utensils for outings and especially for longer trips that parents have to carry with them and a baby food production process that regularly fails to reach the optimal drinking temperature. 
     It is thus the object of the present invention to provide a simple transportable system for providing baby food, which enables baby food to be prepared quickly and at an optimum temperature while on the move. 
     This problem is solved by the independent claims. Preferred embodiments are the subject of the dependent claims. 
     According to a first aspect, the problem is solved by a tempering module for tempering baby food, specifically baby milk or baby puree, which is designed to receive a bag for baby food;
         wherein the tempering module comprises at least one heating element designed to heat an inner wall of the tempering module to control the temperature of the baby food contained in the bag, and   wherein the tempering module comprises at least one tensioning device which is designed to receive the inserted bag in a state in which it is possible to place the bag flat against the inner wall of the tempering module.       

     The “bag” represents a flexible container, which is preferably made of plastic, such as polyethylene. A composite film of polyethylene and polyamide is particularly preferred. In particular, the bag is designed for single use and can be positioned of after its use. 
     The bag is suitable for holding baby food which can be tempered in the tempering module. The term “baby food” is understood to mean baby milk or baby puree. Baby milk can be breast milk or a baby milk which is mixed from a powder (baby food concentrate) and water. By insertion of the bag with the baby food into the tempering module, the baby food can be tempered to drinking or eating temperature. In particular, the tempering module can also be used to heat frozen baby food, such as frozen breast milk. 
     The tempering module thus represents a receptacle in which a bag of baby food can be received in order to heat the baby food when required. 
     As the tempering module is suitable for heating bags, the user can carry pre-portioned baby food units in bags which are tempered as required. The bag can then be disposed of. There is no need to take along baby bottles and no need for the subsequent cleaning and sterilization of the baby bottles. 
     Preferably, the heating element is designed as a heating mat. The heating element can at least partially or completely overlap the inner wall of the tempering module. The heating element heats the inner wall of the tempering module, whereby heat is subsequently transferred from the inner wall of the tempering module to the bag that is inserted into the tempering module. 
     In particular, the tempering module enables rapid tempering of the baby food, since the tempering module holds the bag in the tempering module by means of the at least one tensioning device in such a way that the bag lies flat against the heated inner wall of the tempering module. Collapsing of the bag and kinks in the bag are avoided. Since the bag lies flat against the inner wall, there is no insulating air between the bag and the heated inner wall, which would prevent rapid heating. 
     The tempering module can be operated on the move, preferably by means of a rechargeable battery, or supplied with power via a socket and cable. 
     Preferably, the tempering module is comprised of a rotationally symmetrical tempering module housing with a tempering module base surface and a tempering module insertion opening via which the bag can be inserted into the tempering module housing. 
     It is preferred that at least one tensioning recess is formed as a tensioning device, which extends in a longitudinal direction, in the inner wall of the tempering module housing. 
     The “longitudinal direction” extends parallel to the axis of rotation of the tempering module housing. The tensioning recess is designed in such a way that a corresponding tensioning device, which is arranged on the bag, can be inserted into the tensioning recess via the tempering module insertion opening during insertion. 
     The tempering module may have only one tensioning recess. However, it is also possible that several tensioning recesses are formed in the tempering module. 
     Due to the tensioning recess and a tensioning device of a bag engaging in the tensioning recess, the bag can be held in an upright position in the tempering module without kinks. In particular, the bag lies flat against the inner wall of the tempering module so that rapid heating of the baby food is possible. 
     Alternatively, a circumferential edge on the tempering module insertion opening or a tensioning support surface adjacent to the tempering module insertion opening may form a first tensioning device. 
     The circumferential edge limits the tempering module insertion opening. This edge can form the first tensioning device of the tempering module. Alternatively, however, a tensioning support surface can also be formed offset inwards, which then forms the first tensioning device. In this context, “adjacent” to the tempering module insertion opening is to be understood as a distance from the tempering module insertion opening of preferably up to 3 cm. In order to form the tensioning support surface, the diameter of the interior of the tempering module widens. At the point where the diameter of the interior of the tempering module expands, a tensioning support surface is formed which preferably extends perpendicularly to the longitudinal direction. 
     When the bag is inserted into the tempering module, an appropriate tensioning device may rest on the bag on the circumferential edge or tensioning support surface so that the bag is prevented from covering into the tempering module. 
     In addition, at least one magnet may be arranged in or on the tempering module base surface as a second tensioning device. 
     The at least one magnet is thereby designed to be connected to a magnet in or on the bag. 
     Thus, at opposite ends of the interior of the tempering module there are tensioning devices with respect to the longitudinal direction, which make it possible to hold the bag in the tempering module in such a way that kinks are avoided and the bag can be held flat against the inner wall. This allows the baby food to be quickly tempered in the tempering module. 
     As an alternative to the magnet, a tensioning opening may be formed in the tempering module base surface as a second tensioning device configured to guide a tensioning strap attached to the inserted bag out of the tempering device. 
     In the inserted state, the tensioning strap emerges at least partially from the tempering module via the tensioning opening and can be manually pulled out further by the user. By pulling out the tensioning tab, the bag can be held in the tempering module in addition to the bag resting on the first tensioning device at the upper end of the tempering module in such a way that the bag can be held flat against the inner wall. In this way, the baby food can be quickly tempered in the tempering module. 
     As an alternative to a magnet or a tensioning opening, a circumferential tensioning recess may be formed in the inner wall of the tempering module housing adjacent to the tempering module base surface as a second tensioning device. 
     “Adjacent” to the tempering module base surface is also understood here to mean a distance from the tempering module base surface with respect to the longitudinal direction of preferably a maximum of 3 cm. The circumferential tensioning recess is formed by an area in the inner wall of the tempering module in which the diameter of the interior of the tempering module expands. The circumferential tensioning recess is thereby formed by a surface at which the diameter of the inner space of the tempering module expands. Preferably, the surface extends perpendicular to the longitudinal direction. In particular, it is preferred that the interior of the tempering module expands between the circumferential tensioning recess and the tempering module base surface. 
     A corresponding tensioning device on the inserted bag can engage in the circumferential tensioning recess. In this way, in addition to the bag resting on the first tensioning device at the upper end of the tempering module, the bag can be held in the tempering module in such a way that the bag can be held flat against the inner wall. Thus, the baby food can be quickly tempered in the tempering module. 
     Preferably, the tempering module housing can be opened. 
     This is particularly preferred when the second tensioning device is formed as a circumferential tensioning recess. Preferably, the tempering module can be opened along the longitudinal direction to ensure insertion of the tensioning device into the circumferential tensioning recess as a second tensioning device. 
     According to another aspect of the present invention, the underlying problem is solved by a bag for storing baby food, specifically baby milk or baby puree, comprising at least one chamber for containing baby food;
         wherein the chamber has an opening for filling the chamber;   wherein a connecting element is arranged at the opening;   wherein a first tensioning device is formed on an outer side of the connecting element, wherein the first tensioning device comprises a tensioning projection that runs around at least in some regions;   wherein a second tensioning device is at one end of the bag which is opposite to the end at which the connecting element is arranged, wherein the first and second tensioning device are designed to hold the bag inserted into a tempering module, preferably a tempering module according to one of claims  1  to  8 , in such a way that the bag can be laid flat against an inner wall of the tempering module.       

     Definitions of a bag, which have already been made with regard to the tempering module, also apply here accordingly. 
     At a first end of the bag adjacent to the opening of the bag is the connecting element, which is connected to the flexible bag at the opening of the bag. In contrast to the bag, the connecting element is made of a rigid material, preferably a rigid plastic. 
     A second tensioning device is located at a second end of the bag opposite the first end of the bag. A direction extending between the first and second ends of the bag is referred to as the “longitudinal bag direction”. 
     On an outer side of the connecting element, a tensioning projection is formed as a first tensioning device, that is formed around at least in some regions. The outer side is preferably understood to be the side of the connecting element which extends along the longitudinal direction of the bag. Due to the at least partially circumferential tensioning projection, the connecting element expands along the corresponding area. 
     The tensioning device of the bag are designed to receive the bag in a tempering module in such a way that the bag can lie flat against an inner wall of the tempering module. The bag is prevented from collapsing and forming kinks in the bag. In particular, insulating air between the bag and the inner wall of the tempering module is avoided, so that rapid heating of the baby food can be achieved. 
     According to a preferred embodiment, the bag comprises one chamber. 
     Bags with one chamber are particularly suitable for storing and transporting ready-mixed baby milk or baby puree or breast milk. 
     Preferably, the second tensioning device herein comprises a tensioning plate which is fastened to a base surface of the bag and in or on which at least one magnet is arranged. 
     The “base surface” of the bag is the surface of the bag which is located at the second end of the bag. When the bag is inserted into a tempering module, this base surface is opposite the tempering module base surface. The at least one magnet in or on the tensioning plate of the bag is designed to be connected to a corresponding magnet in or on the tempering module base surface, such that the second end of the bag is held securely against the tempering module base surface. 
     The first tensioning device of the bag is designed to simultaneously rest on a tensioning device on the tempering module, so that the first end of the bag cannot slip into the tempering module. 
     The first and second tensioning device can thus hold the bag in the tempering module such that the bag can be held flat against a heated inner wall of the tempering module, and the baby food can be heated rapidly. 
     Alternatively, the second tensioning device comprises a tensioning strap fastened to a base surface of the bag and extends in a longitudinal direction of the bag. 
     The tensioning strap is configured to extend from a tensioning opening in a tempering module to ensure that the base surface of the bag is securely pulled toward the tempering module base surface. 
     The first tensioning device of the bag is also configured here to simultaneously rest on a tensioning device on the tempering module, so that the first end of the bag cannot slip into the tempering module. 
     By such a configuration of the first and second tensioning device, the bag can thus also be held in the tempering module in such a way that the bag can be held flat against a heated inner wall of the tempering module and the baby food can be heated quickly. 
     Further, the tensioning projection on the connecting element may be a first tensioning projection, wherein the opening at which the connecting element is formed is a first opening;
         wherein the bag comprises a second opening formed on a side of the bag opposite to the side on which the first opening is formed;   wherein a tensioning cover is formed on the second opening, which closes the second opening and on the outer side of which a second tensioning projection is formed around at least in some areas; and
           wherein the first and second tensioning projections are designed in such away that when inserted into a tempering module, the bag is flat against an inner wall of the tempering module.   
               

     At the second end of the bag there is a second opening, which is closed by a tensioning cover. The outer side of the tensioning cover is preferably defined as the side of the tensioning cover extending along the longitudinal direction of the bag. On this outer side, there is a second tensioning projection which is circumferential for at least part of the projection. The size and position of the second tensioning projection can be freely selected or aligned along the longitudinal axis of the bag with a first tensioning projection. 
     The tensioning cover is designed as a rigid element, similar to the connecting element. 
     The first and second tensioning projections are designed to each engage a respective tensioning device in the tempering module, such that the bag is held in the tempering module so that the bag is held flat against a heated inner wall of the tempering module and the baby food can be rapidly heated. 
     Alternatively, the tensioning projection on the connecting element may be a first tensioning projection and the opening at which the connecting element is formed may be a first opening;
         wherein the bag comprises a second opening formed on a side of the bag opposite to the side on which the first opening is formed;   wherein a tensioning cover is formed on the second opening, which closes the second opening and on the outer side of which a second tensioning projection is formed around at least in some areas; and   wherein the second tensioning projection comprises at least one tensioning strut extends in a longitudinal direction of the bag and connected to the first tensioning projection.       

     The above description of the tensioning cover and the first and second tensioning projections also applies here accordingly. 
     In addition, however, the second tensioning projection here has at least one tensioning strut which extends along the longitudinal direction of the bag and is connected to the first tensioning projection. Due to the supporting force of the tensioning strut, the connecting element and the tensioning cover can be held at a stable distance from one another with respect to the longitudinal direction of the bag. The length of the tensioning strut should preferably be selected so that the bag does not have any kinks. 
     In particular, the tensioning strut may be designed to be inserted into a tensioning device in a tempering module along a longitudinal direction. This can further ensure that the bag lies flat against the inner wall of the tempering module, in order to quickly temper the baby food in the bag. 
     Preferably, the connecting element is designed to be connected to a breast pump and/or a dispenser for filling the chamber. 
     It is further preferred that the bag comprises a first chamber and a second chamber which are separated from one another by a separating area; 
     the first chamber being designed to contain a baby food concentrate;
         wherein the second chamber is designed to receive a fluid;   wherein the first and second chamber are arranged along a longitudinal bag direction of the bag;   wherein the separating region can be at least partially opened by applying force to the bag in order to be able to mix the components contained in the first and second chamber to forma a baby food;   wherein the connecting element having the first tensioning projection is a first connecting element and wherein the opening at which the first connecting element is arranged is a first opening;   wherein a second opening is formed on an end opposite to the end at which the first connecting element is formed; and   wherein a second connecting element is formed on the second opening.       

     The bag contains two chambers which are separated from one another by a separating region so that the baby food concentrate and the fluid cannot come into contact with each other and be mixed before use. 
     In particular, the chambers are arranged along the longitudinal direction of the bag with the opposite ends of the bag being open. Here, a first opening is adjacent to the first chamber and a second opening is adjacent to the second chamber. Via the openings, the chambers can be filled (e.g. by the parents) with contents (e.g. the fluid and the baby food concentrate) in advance (e.g. at home). Preferably, the openings can subsequently be closed by means of a first and a second closure respectively. In this way, the baby food is already pre-portioned and can be mixed if necessary. Since the individual components of the baby food are stored separately, the baby food or the contents of the bag have a longer shelf life. 
     For mixing, the user applies force to the bag to at least partially break open or open the separating region so that the individual components or the content(s) of the bag can mix and the baby food can be produced. By shaking the bag, an optimal mixture can be produced. 
     The second connecting element is preferably also formed as a rigid element. 
     Preferably, the second tensioning device comprises at least one magnet arranged in or on a closure which can be connected to the second connecting element. 
     In a bag with two chambers, the at least one magnet is positioned in or on a closure which closes the second opening. The at least one magnet in or on the closure is thereby designed to be connected to a corresponding magnet in or on the tempering module base surface so that the second end of the bag is securely held to the tempering module base surface. 
     The first tensioning device of the bag is designed to simultaneously rest on a tensioning device on the tempering module, so that the first end of the bag cannot slip into the tempering module. 
     The first and second tensioning device can thus hold the bag in the tempering module such that the bag can be held flat against a heated inner wall of the tempering module, and the baby food can be heated rapidly. 
     Alternatively, the second tensioning device may comprise a tensioning strap attached to a closure which can be connected to the second connecting member, the tensioning strap extends along the bag&#39;s longitudinal direction. 
     The tensioning strap is configured to extend from a tensioning opening in a tempering module to ensure that the base surface of the bag is securely pulled toward the tempering module base surface. 
     The first tensioning device of the bag is also configured here to simultaneously rest on a tensioning device on the tempering module, so that the first end of the bag cannot slip into the tempering module. 
     By such a configuration of the first and second tensioning device, the bag can thus also be held in the tempering module in such a way that the bag can be held flat against a heated inner wall of the tempering module and the baby food can be heated quickly. 
     Furthermore, a second tensioning projection may alternatively be formed around at least in some areas, on the outer side of the second connecting element; and
         wherein the first and second tensioning projections are designed, in such a way that when inserted into a tempering module, the bag is flat against an inner wall of the tempering module.       

     At the second end of the bag there is a second opening at which a second connecting element is arranged. The outer side of the second connecting element is preferably defined as the side of the second connecting element which extends along the longitudinal direction of the bag. On this outer side, there is formed around at least in some areas a second tensioning projection. The size and position of the second tensioning projection can be freely selected or aligned along the longitudinal axis of the bag with a first tensioning projection. 
     The first and second tensioning projections are designed to each engage a respective tensioning device in the tempering module, such that the bag is held in the tempering module flat against a heated inner wall of the tempering module and the baby food can be rapidly heated. 
     Furthermore, a second tensioning projection may alternatively be formed around at least in some areas on the outer side of the second connecting element; and
         wherein the second tensioning projection comprises at least one tensioning strut extending along the longitudinal direction of the bag and connected to the first tensioning projection.       

     The definition of the “outer side” of the second connecting element is identical to the outer side already defined above. In addition, the description above regarding the first and second tensioning projections also applies here accordingly. 
     In addition, however, the second tensioning projection here has at least one tensioning strut which extends along the longitudinal direction of the bag and is connected to the first tensioning projection. Due to the supporting force of the tensioning strut, the connecting element and the tensioning cover can be held at a stable distance from one another with respect to the longitudinal direction of the bag. The length of the tensioning strut should preferably be selected so that the bag does not have any kinks. 
     In particular, the tensioning strut may be designed to be inserted into a tensioning device in a tempering module along a longitudinal direction. This can further ensure that the bag lies flat against the inner wall of the tempering module, so as to quickly temper the baby food in the bag. 
     Preferably, the first and second connecting elements are designed to be which can be connected to a dispenser such that the corresponding chamber can be filled by the dispenser. 
     Furthermore, it is preferred that the connecting element is which can be connected to a nipple. 
     This allows the baby to consume the tempered baby food directly from the bag. 
     If the bag has two chambers, the nipple can be connected to at least one of the connecting elements. 
     According to another aspect of the present invention, the underlying problem is solved by a process for tempering a baby food, specifically baby milk or baby puree, which comprises:
         Providing a tempering module according to any of the embodiments described above;   Providing a bag according to any of the embodiments described above, which is filled with baby food;   insertion of the bag into the tempering module in such a way that the bag is hold flat against the inner wall of the tempering module by the tensioning device of the bag and the at least one tensioning device of the tempering module; and   tempering the baby food.       

     Preferably, providing a bag comprises providing a bag having one chamber,
         wherein the bag is inserted into the tempering module such that the tensioning projection on the connecting element rests on the first tensioning device of the tempering module and the at least one magnet on the bag makes contact with the at least one magnet in or on the tempering module base surface.       

     Alternatively, providing a bag, may comprise providing a bag having one chamber
         wherein the bag is inserted into the tempering module in such a way that the tensioning projection on the connecting element rests on the first tensioning device of the tempering module and the tensioning strap of the bag is at least partially withdrawn from the tensioning opening in the base surface of the tempering module.       

     Further, providing a bag may comprise providing a bag having one chamber,
         wherein the bag is inserted into the tempering module in such a way that the first tensioning projection on the connecting element rests on the first tensioning device of the tempering module and the second tensioning projection on the tensioning cover engages in the second tensioning device of the tempering module.       

     Alternatively, providing a bag may comprise providing a bag having two chambers,
         wherein the separating region is at least partially opened by applying force and the components contained in the first and second chamber are mixed together to form a baby food before the bag is inserted into the tempering module.       

     Preferably, the bag is inserted into the tempering module such that the at least one tensioning strut of the bag is inserted into the longitudinal direction into the tensioning recess of the tempering module. 
     Preferably, the bag is inserted into the tempering module such that the tensioning projection on the first connecting element rests on the first tensioning device of the tempering module and the at least one magnet of the bag makes contact with the at least one magnet in or on the tempering module base surface. 
     Preferably, the bag is inserted into the tempering module such that the tensioning projection on the first connecting element rests on the first tensioning device of the tempering module and the tensioning strap of the bag is at least partially withdrawn from the tensioning opening in the tempering module base surface. 
     Furthermore, it is preferred that the bag is inserted into the tempering module in such a way that the tensioning projection on the first connecting element rests on the first tensioning device of the tempering module and the second tensioning projection on the second connecting element engages in the second tensioning device of the tempering module. 
    
    
     
       These and other objectives, features and advantages of the present invention will become clearer from a study of the following detailed description of preferred embodiments and the accompanying drawings. Further, it is noted that although embodiments are described separately, individual features of these embodiments may be combined to form additional embodiments. 
         FIG. 1  shows a first embodiment of a bag for storing baby food; 
         FIG. 2  shows a first embodiment of a tempering module with an inserted bag according to  FIG. 1 ; 
         FIG. 3  shows a second embodiment of a bag for storing baby food; 
         FIG. 4  shows a second embodiment of a tempering module with an inserted bag according to  FIG. 3 ; 
         FIG. 5  shows a third embodiment of a bag for storing baby food; 
         FIG. 6  shows a third embodiment of a tempering module with an inserted bag according to  FIG. 5 ; 
         FIG. 7  shows a fourth embodiment of a bag for storing baby food; 
         FIG. 8  shows a fourth embodiment of a tempering module with an inserted bag according to  FIG. 7 ; 
         FIG. 9  shows a bag according to the first embodiment with two chambers; 
         FIG. 10  shows a bag according to the second embodiment with two chambers; 
         FIG. 11  shows a bag according to the third embodiment with two chambers; 
         FIG. 12  shows a bag according to the fourth embodiment with two chambers  FIG. 13  shows a tempering process according to a preferred embodiment for tempering the baby food in the bag; and 
         FIG. 14  shows further embodiments of a separating region for a bag with two chambers. 
     
    
    
     Various embodiments of tempering modules  100 , into each of which a bag  1  of baby food is at least partially insertable to tempering the baby food, are described below. 
       FIG. 1  shows a first embodiment of a bag  1 .  FIG. 1 a   ) shows a top view of the bag  1 ,  FIG. 1 b   ) a sectional view of the bag  1  in the sectional axis B-B and  FIG. 1 c   ) a perspective view of the bag  1 . 
     The bag  1  is preferably made of plastic (for example polyethylene or a composite film of polyethylene and polyamide) substantially in the form of a tube. In particular, the tube is made in one piece without seams and preferably has a longitudinal bag axis BL. Furthermore, the bag material may comprise thermally conductive particles, preferably aluminium and/or copper particles, which allow an improved tempering of the baby food in the bag  1 . 
     The bag  1  comprises one chamber  2 , which is accessible at a first end  9  via an opening  8 . At a second end  13  of the bag  1 , which is opposite to the first end  9 , the bag  1  is closed, preferably by a welding seam. The longitudinal bag axis BL extends from the first end  9  to the second end  13  of the bag  1 . In particular, the opening  8  is designed to be filled with a baby food. For example, pre-made baby milk or baby formula, or breast milk may be filled into the bag  1 . 
     In order to close the chamber  2  for transport, the opening  8  in the bag  1  may be closed by means of an appropriate closure. For this purpose, a connecting element  4  may be provided at the opening  8 . The connecting element  4  can thereby be formed as an circular element, which is preferably made of plastic. In particular, it is advantageous here if the connecting element  4 , in contrast to the bag  1  itself, is designed to be rigid or to have a higher rigidity. In order to connect the connecting element  4  to the bag  1 , the connecting element  4  may be welded to the bag  1 . 
     As shown in  FIG. 1 b   ), the closure can be designed as a cover  20  which can be connected to the connecting element  4 . The cover  20  may be connected to the connecting element  4  by means of a hooking or clicking mechanism. Alternatively, the connecting element  4  and/or the cover  20  may have one or more sealing lips which, when in contact with the other element, have both a sealing and a fixing function.  FIG. 1 b   ), on the other hand, shows a screw mechanism. On an outer surface  23  (“outside”) of the connecting element  4  and on an inner surface  25  of the cover  20  there is in each case, at least in some areas, a thread  27  which engages in one another or interacts with one another in the connection process. The outer surface  23  thereby preferably runs parallel to the longitudinal axis BL of the bag. 
     In particular, the connecting element  4  can also be used to be connected to a dispenser designed, for example, to dispense ready-made baby food into the chamber  2 . In particular, it is preferred that the bag  1  is compatible with a dispenser such as published in the publication WO 2017/121638 A1 and/or in the German patent application DE 10 2018 009 551, which are incorporated herein by reference in their entirety. The connecting element  4  may be connected to the dispenser directly herein or by means of an adapter. The amount of baby food can be manually adjusted on the dispenser. Alternatively, the dispenser dispenses predetermined or pre-portioned units to the bag  1 . However, the dispenser may also comprise a sensor that automatically detects a connected bag  1  and, additionally, the size of the bag  1 . Alternatively, an RFID tag could be provided or incorporated in or on the connecting element  4  for this purpose. As soon as the dispenser recognizes a bag  1 , a corresponding amount of a baby food can subsequently be dispensed automatically. Due to the compatibility with a dispenser, the chamber  2  can thus be filled quickly and precisely. 
     Alternatively or additionally, the connecting element  4  may be connected to a breast pump for expressing breast milk. 
     The bag size is thereby designed such that preferably between 50 ml and 300 ml of baby food can be filled in. A size which allows 250 ml of baby food to be filled in is particularly preferred. Furthermore, the bag  1  may be folded in certain areas so that the chamber  2  is reduced in size. The fold may be unfolded as required. The folded area can be fixed with an adhesive strip and/or a clip. 
     In order to be able to temper the filled baby food if necessary, the bag  1  is to be inserted into a tempering module  100 , as shown for example in  FIG. 2 , whose tempering module interior  104  can be tempered. In particular, the tempering module interior  104  can be tempering led by a heated inner wall  112 . 
     However, since the bag  1  is a flexible container, the bag  1  often has kinks where the bag  1  buckles. In other words, the bag  1  itself cannot be held in an upright position. In particular, at the buckling points, in a state inserted into the tempering module  100 , air is present between the bag  1  and the inner wall  112  of the tempering module  100 , which has an insulating effect and thus deteriorates or slows down heat transfer to the bag  1  or the baby food. 
     In order to ensure that such kinks are avoided and that the bag  1  lies flat against the inner wall  112  of the tempering module  100 , the bag  1  comprises various tensioning devices which can hold the bag  1  in an upright position in the tempering module  100 . 
     As shown in  FIGS. 1 b   ) and  1   c ), the bag  1  according to the first embodiment has a first tensioning device  40  on the connecting element  4 , which is formed as a tensioning projection  42 , running around at least in some areas. The at least in some areas circumferential tensioning projection  42  is located, on the outer surface  23  of the connecting element  4 , so that the diameter of the connecting element  4  is increased by the tensioning projection  42  which is formed around at least in some areas. 
     Additionally, the bag  1  comprises a second tensioning device  44  at the second end  13  of the bag. The second tensioning device  44  comprises a tensioning plate  46 , which is fastened to a base surface  48  of the bag  1 . At least one magnet  31  is located on or in the tensioning plate  46 . 
       FIG. 2  shows a first embodiment of a tempering module  100  in which, for example, the bag  1  according to  FIG. 1  can be inserted and which comprises tensioning devices which can be connected to the tensioning device of the bag  1  in order to hold the bag  1  in an upright position in the tempering module  100 . In particular, this allows the bag  1  to be held flat against the inner wall  112  of the tempering module  100  to ensure rapid heating of the baby food. 
       FIG. 2 a   ) shows a top view of the tempering module  100 ,  FIG. 2 b   ) a sectional view of the tempering module  100  in the sectional axis B-B and  FIG. 2 c   ) a perspective view of the tempering module  100 . 
     The tempering module  100  comprises a tempering module housing  102 , which is preferably rotationally symmetrical in shape. However, only the tempering module interior  104  may be rotationally symmetrical in shape, while the exterior shape of the tempering module housing  102  is freely selectable. In addition, the tempering module housing  102  has a tempering module base surface  106 . On a side opposite to the tempering module base surface  106 , there is a tempering module insertion opening  108  via which the bag  1  is at least partially insertable into the tempering module  100 . 
     During the tempering process, the tempering module insertion opening  108  may be closed by a cover (not shown). However, it is also possible that a nipple positioned on the bag  1  and which can be connected to the connecting element  4  substantially closes the tempering module insertion opening  108 . In particular, it is preferred that the diameter of the circumferential tensioning projection  42  on the connecting element  4  is larger than the diameter of the tempering module insertion opening  108 , so that the connecting element  4  can be prevented from covering into the tempering module interior  104 . In this case, the circumferential tensioning projection  42  would rest on a circumferential edge  109  of the tempering module  100 , which outwardly limits the tempering module insertion opening  108 . Alternatively, as shown in  FIG. 2 b   ), the diameter D of the tempering module interior  104  may expand in an area adjacent the tempering module insertion opening  108  to form a step as a tensioning support surface  111 . It is preferred that the diameter D of the tempering module interior  104  is expanded from the tempering module insertion opening  108  to the tensioning support surface  111 . When the bag  1  is inserted into the tempering module interior  104 , the circumferential tensioning projection  42  can rest on the tensioning support surface  111  so that the connecting element  4  can be prevented from covering into the tempering module interior  104 . According to an embodiment, the circumferential edge  109  of the tempering module  100  and the tensioning support surface  111  thus serve as a “first tensioning device”. To lock the bag  1  in the tempering module  100 , the tensioning projection  42  may be clicked onto the circumferential edge  109  or the tensioning support surface  111 . 
     More preferably, the tempering module  100  has a height H of from about 80 mm to about 130 mm. Preferably, the wall thickness of the tempering module  100  is in a range between about 0.5 mm and about 1.0 mm. A wall thickness of about 0.8 mm is particularly preferred. The diameter D of the tempering module  100  is preferably between about 45 and about 70 mm. 
     The height H of the tempering module interior  104  is preferably set such that the bag  1  can be arranged in a preferably stretched position in the tempering module interior  104 . In this way, a faster tempering of the contents of the bag  1  or of the baby food can be achieved. The height H of the tempering module interior  104  can thereby either be defined by the length of the tempering module  100  as such, or can be combined as desired by tempering module extension elements. The individual tempering module extension elements may be clicked together or screwed together. If the tempering module  100  has multiple extension elements, the uppermost extension element has the first tensioning device. 
     At least one heating element is arranged on at least one portion of the inner wall  112  of the tempering module housing  102 . The heating element can heat the inner wall  112  of the tempering module housing  102 , preferably the heating element is located outside the tempering module interior  104 . In other words, the inner wall  112  can be tempered from the outside by the heating element and the heat is transferred to the tempering module interior  104  via the inner wall  112 . Preferably, the heating element may be formed as a heating mat  122  that overlaps the inner wall  112  of the tempering module housing  102 , at least in some areas. Alternatively, the heating element may be formed as a heating plate, heating foil, or heating board. In the following, however, only the heating mat  122  is discussed by way of example. However, the explanations also apply to the other alternatives of a heating element. 
     Preferably, the inner wall  112  of the tempering module housing  102  is at least partially made of a thermally conductive material, such as aluminum or copper. For this purpose, the inner wall  112  may be manufactured as a tubular element made of aluminum or copper. As manufacturing tolerances for the diameter of the tubular element, +/−1 mm is preferred. Via this, the heat generated by the heating mat  122  can be substantially evenly distributed via the tempering module housing  102  and delivered into the tempering module interior  104 . Thus, the contents of the bag  1  or the baby food can be heated evenly. 
     In order to achieve the fastest possible tempering of the content of the bag  1  or the baby food, the tempering module interior  104  is dimensioned in relation to the bag  1  such that the bag  1  is in surface contact with the inner wall  112  when inserted. The more surface area of the bag  1  in contact with the inner wall  112 , the faster heating can occur. If the tempering module housing  102  comprises a plurality of tempering module extension elements  110 , each tempering module extension element  110  preferably comprises at least one heating element. In order to provide power to each of the heating elements on the tempering module extension elements  110 , it is necessary to provide connectivity between the tempering module extension elements  110  that allows power to be transferred to the individual heating elements. 
     As already mentioned above, it is additionally advantageous if heat-conducting particles are incorporated into the material of the bag  1 . These enable an even better transfer of heat to the baby food. The particles can be aluminium or copper particles. 
     In addition, at least one magnet  116  may be arranged in the tempering module base surface  106  as a “second tensioning device” which, in the inserted state, interacts with the at least one magnet  31  of the bag  1  (see, for example,  FIG. 1 b   )). The magnet  31  in or on the tensioning plate  46  of the bag  1  is arranged adjacent to the tempering module base surface  106  in the inserted state of the bag  1 . This fixes the bag  1  to the tempering module base surface  106 . 
     By the interaction of the tensioning device of the bag  1  and the tensioning devices of the tempering module  100 , the bag  1  is held in an upright position and the bag  1  can be held flat against the heatable inner wall  112  of the tempering module  100 . Thus, rapid heating of the baby food is possible. 
       FIG. 3  shows a second embodiment of a bag  1 .  FIG. 3 a   ) shows a top view of the bag  1 ,  FIG. 3 b   ) a sectional view of the bag  1  in the sectional axis D-D and  FIG. 3 c   ) a perspective view of the bag  1 . 
     The second embodiment of the bag  1  differs from the first embodiment of the bag  1  only in the second tensioning device  44 . The rest of the embodiment of the bag  1  remains the same, so that only the differences are described here. 
     In particular, the second embodiment of the bag  1  does not comprise a tensioning plate  46  with at least one magnet  31 , but a tensioning strap  50  which is attached to the base surface  48  of the bag  1 . Preferably, the tensioning strap  50  extends in the bag&#39;s longitudinal axis BL. 
     The tensioning strap  50  may include one or more locating apertures  52  in the bag&#39;s longitudinal axis. 
       FIG. 4  shows a second embodiment of a tempering module  100  in which, for example, the bag  1  of  FIG. 3  can be inserted and which comprises tensioning devices which can be connected to the tensioning device of the bag  1  of  FIG. 3  in order to hold the bag  1  in an upright position in the tempering module  100 . In particular, this allows the bag  1  to be held flat against the inner wall  112  of the tempering module  100  to ensure rapid heating of the baby food. 
       FIG. 4 a   ) shows a top view of the tempering module  100 ,  FIG. 4 b   ) a sectional view of the tempering module  100  in the sectional axis D-D and  FIG. 4 c   ) a perspective view of the tempering module  100 . 
     The tempering module  100  according to the second embodiment differs here only from the tempering module  100  of the first embodiment in the second tensioning device, so that only the second tensioning device is described here. 
     In particular, the second tensioning device here comprises a tensioning opening  118  in the tempering module base surface  106 . The tensioning aperture  118  can be used to guide the tensioning strap  50  out of the tempering module interior  104 . By pulling on the tensioning strap  50 , the base surface  48  of the bag  1  can be pulled towards the tempering module base surface  106  to hold the bag  1  in an upright position in the tempering module  100  and ensure rapid heating. Preferably, in order to avoid heat loss via the tensioning opening  118 , the  118  is only slightly larger than the tensioning strap  50 . Preferably, a rubber seal is attached to the tensioning opening  118 . 
     The tensioning strap  50  may be fastened to a bottom side  120  of the tempering module  100  by means of one of the fixing apertures  52 . A corresponding fixing pin may be provided here on the bottom side  120  of the tempering module  100 , which pin engages in the fixing aperture  52 . 
     By the interaction of the tensioning device of the bag  1  and the tensioning devices of the tempering module  100 , the bag  1  is again held in an upright position and the bag  1  can be held flat against the heatable inner wall  112  of the tempering module  100 . Thus, rapid heating of the baby food is possible. 
       FIG. 5  shows a third embodiment of a bag  1 .  FIGS. 5 a   ) and  5   d ) each show a top view of the bag  1 ,  FIGS. 5 b   ) and  5   e ) show a sectional view of the bag  1  in the sectional axis F-F and  FIGS. 5 c   ) and  5   f ) show a perspective view of the bag  1 . 
     The third embodiment of the bag  1  differs from the first and second embodiments of the bag  1  only in the second tensioning device  44 . The rest of the embodiment of the bag  1  remains the same, so that only the differences are described here. 
     The opening  8  of the bag  1  at the first end  9  of the bag  1  is here a first opening  11 , and the tensioning projection  42  is formed around at least in some areas, on the connecting element  4  is referred to as a first tensioning projection  58 . However, in this embodiment the bag  1  is not closed at the second end  13  of the bag  1 , but has a second opening  15 . 
     The second opening  15  is closed by means of a tensioning cover  54 . In order to form the second tensioning device  44 , the tensioning cover  54  has a second tensioning projection  62  formed around at least in some areas on an outer side  60 . In this regard, the outer side  60  preferably extends parallel to the longitudinal bag axis BL. In particular, the tensioning cover  54  may be rotationally symmetrical. 
     If the second tensioning projection  62  is only formed in sections, the individual sections may be of equal or different sizes. The distances between the sections may be of equal or different sizes. In particular, the sections may be aligned with sections of the first tensioning projection  58  with respect to the longitudinal direction of the bag BL, or may be offset from each other. 
     In one aspect, the tensioning cover  54  can close the second opening  15  in such a way that the second opening  15  cannot be opened, as shown in  FIGS. 5 a   ) to  5   c ). In this regard, the tensioning cover  54  may preferably be formed in one piece and be fixedly connected to bag  1 . However, as shown in  FIGS. 5 d   ) to  5   f ), the tensioning cover  54  may also be formed in two parts. Here, the connecting element  4  becomes a “first connecting element”  17  and the tensioning cover  54  itself has a second connecting element  19 . On the second connecting element  19 , which is connected to the bag  1 , the second tensioning projection  62  is located here on the outer surface  56  thereof. The outer surface  56  of the second tensioning projection  62  preferably extends parallel to the longitudinal axis BL of the bag. Furthermore, it is preferred that the first and second connecting elements  17 ,  19  are identically formed. The second connecting element  19  can be closed with a closure corresponding to the first connecting element  19 . As shown in  FIG. 5 b   ), the second opening  15  can be closed with a cover  21  which is screwed onto the second connecting element  19 . However, other closure mechanisms as already described above are also possible here. 
       FIG. 6  shows a third embodiment of a tempering module  100  in which, for example, the bag  1  of  FIG. 5  can be inserted and which comprises tensioning devices which can be connected to the tensioning devices of the bag  1  of  FIG. 5  in order to hold the bag  1  in an upright position in the tempering module  100 . In particular, this allows the bag  1  to be held flat against the inner wall  112  of the tempering module  100  to ensure rapid heating of the baby food. 
       FIG. 6 a   ) shows a top view of the tempering module  100 ,  FIG. 6 b   ) a sectional view of the tempering module  100  in the sectional axis F-F and  FIG. 6 c   ) a perspective view of the tempering module  100 . 
     The tempering module  100  according to the third embodiment differs here only from the tempering module  100  of the first embodiment and second embodiment in the second tensioning device, so that only the second tensioning device is described here. 
     As shown in  FIG. 6 b   ), in the third embodiment, the diameter D of the tempering module interior  104  expands adjacent the tempering module base surface  106  to form a step in the interior wall  112 . The increase in diameter D forms a circumferential tensioning recess  124  as a second tensioning device in the tempering module  100 . Preferably, the tensioning recess  124  extends with respect to a longitudinal axis L of the tempering module from the step to the tempering module base surface  106 . The longitudinal axis L of the tempering module  100  extends from the tempering module insertion opening  108  to the tempering module base surface  106 . 
     The circumferential tensioning recess  124  is configured to allow the second tensioning projection  62  of the bag  1  to be inserted. To enable such insertion, the tempering module  100  may be openable. For this purpose, the tempering module housing  102  may be divided in two with respect to the longitudinal axis L. A portion of the tempering module housing  102  may be removable or pivotable by a hinge  114  extending in the longitudinal axis L, as shown in  FIG. 6 . 
     By the interaction of the tensioning device of the bag  1  and the tensioning devices of the tempering module  100 , the bag  1  is again held in an upright position and the bag  1  can be held flat against the heatable inner wall  112  of the tempering module  100 . Thus, rapid heating of the baby food is possible. 
       FIG. 7  shows a fourth embodiment of a bag  1 .  FIG. 7 a   ) shows a top view of the bag  1 ,  FIG. 7 b   ) a sectional view of the bag  1  and  FIG. 5 c   ) a perspective view of the bag  1 . 
     The fourth embodiment of the bag  1  differs from the third embodiment of the bag  1  only in the second tensioning device  44 . The remaining embodiment of the bag  1  remains the same, so that only the differences are described here. 
     More specifically, the second tensioning device  44  here additionally comprises at least one tensioning strut  64  extending in the longitudinal bag axis BL and connected to the first and second tensioning projections  58 ,  62 . Likewise, it is possible that the tensioning strut  64  is integrally formed with the first and second tensioning projections  58 ,  62 . 
     As described above, the tensioning projections  58 ,  62  may be formed to be either fully circumferential or only circumferential in certain areas. In particular, as shown in  FIGS. 7 a   ) to c), the portions of the tensioning projections  58 , 62  may be formed only where the tensioning struts  64  are formed.  FIG. 7  shows four tensioning struts  64  arranged uniformly around the bag  1 . However, the tensioning struts  64  can also be at different distances from one another. 
       FIG. 7 b   ) shows here a tensioning cover  54  which is designed to be openable. As already described with regard to  FIG. 5 , the tensioning cover  54  can also be designed in such a way that the second opening  15  is firmly closed by the tensioning cover  54  and thus cannot be opened. 
       FIG. 8  shows a fourth embodiment of a tempering module  100  in which, for example, the bag  1  of  FIG. 7  can be inserted and which comprises tensioning devices which can be connected to the tensioning device of the bag  1  of  FIG. 7  in order to hold the bag  1  in an upright position in the tempering module  100 . In particular, this allows the bag  1  to be held flat against the inner wall  112  of the tempering module  100  to ensure rapid heating of the baby food. 
       FIG. 8 a   ) shows a top view of the tempering module  100 ,  FIG. 8 b   ) a sectional view of the tempering module  100  and  FIG. 8 c   ) a perspective view of the tempering module  100 . 
     Contrary to the previously described embodiments of the tempering modules  100 , the tempering module  100  of the fourth embodiment has a constant diameter D. However, the inner wall  112  here has, as a tensioning device, at least one tensioning recess  126  extending along the longitudinal direction L of the tempering module  100 . In particular, the tensioning recess  126  is configured such that a corresponding tensioning strut  64  can be inserted into the tensioning recess  126 . Preferably, for this purpose, the tensioning strut  64  extends from the tempering module insertion opening  108  to the tempering module base surface  106 . 
     By the interaction of the tensioning device of the bag  1  and the tensioning device of the tempering module  100 , the bag  1  is again held in an upright position and the bag  1  can be held flat against the heatable inner wall  112  of the tempering module  100 . Thus, a rapid heating of the baby food is possible. 
     All of the embodiments of the bag  1  already described each have one chamber  2 . However, the bag  1  may also have at least two chambers, as will be shown below. 
       FIG. 9  shows the first embodiment (see  FIG. 1 ) of the bag  1  with two chambers. 
       FIG. 9  shows a bag  1  for the production of baby food according to a preferred embodiment. For the production of baby food, various baby food concentrates from different manufacturers are commercially available, which, when mixed with water, produce the required baby food. The baby food concentrate is typically in powder form. In particular, the baby food concentrate may be milk powder or a puree powder. 
     The bag  1  has at least one first chamber  3  and a second chamber  5 , which are arranged in the bag longitudinal direction BL.  FIG. 9  shows a sectional view in the longitudinal direction of the bag BL. The chambers  3 ,  5  are separated or separated from each other by a separating region  7 , wherein the separating region  7  preferably has at least one welding seam. As shown in  FIG. 9 , the separating region  7  creates a necking in the bag  1 . 
     The opposite or opposing ends of the bag  1  with respect to the bag longitudinal direction BL have openings. Specifically, at the first end  9  of the bag  1  adjacent to the first chamber  3  the first opening  11  is formed, while at the second end  13  (opposite to the first end  9 ) of the bag  1  adjacent to the second chamber  5  the second opening  15  is formed. The openings  11 ,  15  may be of the same size or of different sizes. In particular, the openings  11 ,  15  serve for filling the respective chambers  3 ,  5 . The first chamber  3  is designed to be filled with a baby food concentrate, whereas the second chamber  5  is designed to be filled with a fluid. The fluid may be, for example, water (specifically sterile water) which, when mixed with the baby food concentrate, produces a baby milk or a baby puree. Preferably, the bag  1  is filled in advance (for example, already at home) to provide a pre-portioned bag  1  for a later time (for example, on the go). 
     In order to close the chambers  3 ,  5  for transport, the individual openings  11 ,  15  in the bag  1  can be closed by means of corresponding closures. For this purpose, the first connecting element  17  may be provided at the first opening  11  and the second connecting element  19  may be provided at the second opening  15 . The connecting elements  17  and/or  19  can thereby be formed as circular elements, which are preferably made of plastic. In particular, it is advantageous in this case if the connecting elements  17 ,  19 , in contrast to the bag  1  itself, are designed to be rigid or to have a higher rigidity. In order to connect the connecting elements  17 ,  19  to the bag  1 , the connecting elements  17 ,  19  can be welded to the bag  1 . On the first connecting element  17  there is the at least partially circumferential tensioning projection  42  as described above with respect to  FIG. 1 . 
     As shown in  FIG. 9 , the closure or closures may be in the form of cover s  21 , each of which is which can be connected to the connecting elements  17 ,  19 . The cover s  21  may be connected to the connecting elements by means of a hooking or clicking mechanism. Alternatively, the connecting elements  17 ,  19  and/or the cover s  21  may have one or more sealing lips which, when in contact with the respective other element, have both a sealing and a fixing function.  FIG. 9 , on the other hand, shows a screw mechanism. On the outer surface  23  of the connecting element  17  or  19  and on an inner surface  25  of the cover  21  there is in each case, at least in some areas, a thread  27  which engages in one another or interacts with one another in the connecting process. 
     In particular, the connecting element  17  or  19  can also be used to be connected to a dispenser designed, for example, to dispense a baby food concentrate into the first chamber  3 . In particular, it is preferred that the bag  1  is compatible with a dispenser such as published in the publication WO 2017/121638 A1 and/or in the German patent application DE 10 2018 009 551, which are incorporated herein by reference in their entirety. The connecting element  17  and/or  19  may be connected to the dispenser directly herein or by means of an adapter. The amount of baby food concentrate may be manually adjusted at the dispenser. Alternatively, the dispenser dispenses predetermined or pre-portioned units to the bag  1 . However, the dispenser may also comprise a sensor that automatically detects a connected bag  1  and, in a complementary manner, the size of the bag  1 . In particular, based on the size of the connected connecting element  17 ,  19  the dispenser could detect whether it is the powder chamber or water chamber. Depending on which chamber the dispenser detects, the dispenser then dispenses either water or powder. The size of the connected connecting element  17 ,  19  may thereby also provide information to the dispenser as to how much water or powder is to be dispensed. Alternatively, an RFID tag could be provided or incorporated in or on the connecting element  17 ,  19  for this purpose. Once the dispenser detects a bag  1 , a corresponding amount of a baby food concentrate can subsequently be dispensed automatically. This is also possible with respect to the second chamber  5  and the supply of a fluid. Thus, by being compatible with a dispenser, the chambers  3 ,  5  can be filled quickly and precisely. 
     If baby food is now required at a later time (e.g. while travelling, for example), only the separating region  7  can be at least partially opened. For this purpose, it is sufficient if force is applied to the bag  1  from the outside. If the separating region  7  is formed, for example, by a welding seam, the force is to be applied in such a way that the bag sides, which are connected to one another by the welding seam, at least partially separate from one another again as a result of the force applied. However, the bag sides themselves are not damaged in the process, so that leakage of the filled components is avoided. Once the separating region  7  has been opened, the filled components can be mixed together, so that subsequently the baby food is produced. Preferably, the bag  1  can be shaken. 
     The force to be applied may, for example, be applied by pushing on the bag  1  and/or by pulling the bag  1  substantially in the longitudinal direction of the bag BL. 
     Before or after opening the separating region  7 , on one side of the bag  1 , the cover  21  can be replaced specifically by a nipple. As soon as the separating region  7  is opened and the individual components are mixed in the bag  1 , the baby can consume the baby food directly from the bag  1 . 
     Contrary to the first embodiment of the bag  1  with one chamber, the at least one magnet  31  is here not arranged in a tensioning plate  46 , but in the closure which closes the second opening  15 .  FIG. 9  shows a cover  21  on or in which the at least one magnet  31  is arranged as a second tensioning device  44 . 
       FIG. 10  shows a bag  1  with two chambers according to the second embodiment. 
     The bag  1  is formed here as described with respect to  FIG. 9 . However, here there is no magnet as a second tensioning device  44  in the cover  21  for closing the second opening  15 . Rather, here the tensioning strap  50  is attached to the cover  21 . 
       FIG. 11  shows a bag  1  with two chambers according to the third embodiment. 
     The bag  1  is formed here as described with reference to  FIG. 9 . However, here there is no magnet as a second tensioning device in the cover  21  for closing the second opening  15 . Rather, here the second tensioning projection  62  is arranged or formed on the second connecting element  19 . 
       FIG. 12  shows a bag  1  with two chambers according to the fourth embodiment. This is identical to the bag  1  according to  FIG. 7 , but in contrast to  FIG. 7  it has two chambers. 
     All embodiments described with two chambers can also be designed without a separating region  7  and consequently be used as a bag with only one chamber. 
     In order to supply the tempering module  100  with energy to control the temperature of the baby food, the tempering module  100  can be connected to a connection unit  200 , as shown in  FIG. 13 . 
     For this purpose, tempering module connection contacts may be arranged in the tempering module base surface  106 , via which the tempering module  100  may be connected to the connection unit  200 . In particular, the heating mat  122  can thereby be connected. 
     In particular, the tempering module  100  is configured such thon the tempering module  100  can additionally be used as a holding device for the bag  1 . In particular, after the baby food has been tempered in the bag  1 , the baby can drink directly from the bag  1  which is held in the tempering module  100 . Via this, the user can hold a stable element resembling a bottle while the flexible bag  1  is arranged inside the tempering module  100 . 
     In the following, the connection unit  200  will now be described, which is shown, for example, in  FIG. 13  (see steps  3  and  4  of the tempering process). 
     The connection unit  200  comprises a connection unit housing  202 , the upper surface of which is a connection surface  204  onto which the tempering module  100 , specifically the tempering module base surface  106 , can be positioned. Preferably, the tempering module  100  can be clicked onto the connecting surface  204  using a click mechanism. This allows the tempering module  100  to be securely connected to the connection unit  200 . Furthermore, the click mechanism can already be used to start the tempering process as soon as the tempering module  100  is clicked onto the connection surface  204 . 
     Preferably, at least one rechargeable battery (e.g. a lithium polymer battery) is arranged inside the connection unit housing  202 . This serves as an energy storage device, which supplies energy to the tempering module  100  when required to supply the heating element with power. The rechargeable battery makes it possible to always have energy available for tempering baby food, even when on the move—independently of a power socket. E.g. by means of a USB connection or a conventional power cable, the rechargeable battery can be at least partially charged again. The battery as well as the heating mat  122  are preferably designed in such a way that both liquid and frozen baby food can be heated in the tempering module  100 . 
     Furthermore, a control unit may be arranged in the interior of the connection unit housing  202 , which is connected to the battery in order to start and stop a tempering process by delivering energy to the heating element or by stopping the delivery. The duration of the tempering process may be determined by a fixed predefined time, or may occur as a function of an achieved temperature that has been reached in the tempering module interior  104 . For this purpose, a sensor may be provided in the tempering module interior  104  which measures the temperature in the tempering module interior  104  (e.g. regularly or at different times) and transmits the measured data to the control unit. Depending on the measured temperatures, the control unit then controls the further tempering process. This function can also be used to maintain baby food in the tempering module  100  substantially at a predetermined or predeterminable temperature. For example, the desired temperature may be set at the connection unit  200 . In addition, switches may be located on the connection unit  200  to trigger a start and/or stop of the tempering process. Alternatively or additionally, the connection unit  200  may be controllable via an app. 
     Alternatively, the tempering module  100  may be powered directly by means of a cable and a power outlet. 
       FIG. 13  shows specifically that a nipple  29  is connected to a connecting element  4 ,  17 ,  19 . This protrudes from the tempering module  100  during the tempering process and can be used to consume the baby food after the tempering process. The bag  1  preferably remains in the tempering module  100  as a holding device. 
     In the embodiments of a bag  1  with two chambers described so far, the separating region  7  was preferably produced by means of a welding seam. In the following, further possibilities will be shown. 
     As shown in  FIG. 14 a   ), the separating region  7  may also have at least one folding edge  34 . At the folding edge  34 , the bag  1  is folded in the separating region  7  by an angle of up to about 180°, preferably so that the first chamber  3  and the second chamber  5  lie substantially on top of each other. The folded state is specifically fixed by a fixing adhesive tape  36 , which is specifically arranged in the separating region  7  to fix the folded area. If the individual components are to be mixed to form a baby food, the first chamber  3  and second chamber  5  can be unfolded so that the separating region  7  is opened. 
     Further, the separating region  7  between the first chamber  3  and the second chamber  5  may comprise a clamp that clamps the bag  1  in the separating region  7 . By opening the clamp, the separating region  7  is opened. 
     As a still further alternative, the separating region  7  may be formed by twisting the bag  1  in the separating region  7 . The twisted state of the bag  1  may be fixed by a seal  38  (e.g. adhesive tape). If the user pulls on the bag  1  substantially in the longitudinal direction of the bag BL, the seal  38  breaks and the twist of the bag  1  may be released, allowing the components contained in the bag  1  to mix. In addition to the twist, the bag  1  may be folded as described above, as shown in  FIG. 14 b   ). 
     LIST OF REFERENCE SIGNS 
     
         
           1  bag 
           2  chamber 
           3  first chamber 
           4  connecting element 
           5  second chamber 
           7  separating region 
           8  opening 
           9  first end of the bag 
           11  first opening 
           13  second end of the bag 
           15  second opening 
           17  first connecting element 
           19  second connecting element 
           21  cover 
           23  outer surface of the connecting element 
           25  inner surface of the cover 
           27  thread 
           29  nipples 
           31  magnet 
           34  folding edge 
           36  adhesive tape 
           38  seal 
           40  first tensioning device 
           42  circumferential tensioning projection on the connecting element 
           44  second tensioning device 
           46  tensioning plate 
           48  base surface of the bag 
           50  tensioning strap 
           52  fixation opening 
           54  tensioning cover 
           56  outer surface of the tensioning cover 
           58  first tensioning projection 
           60  outside of the tensioning cover 
           62  second tensioning projection 
           64  tension strut 
           100  tempering module 
           102  tempering module housing 
           104  tempering module interior 
           106  tempering module base surface 
           108  tempering module insertion opening 
           109  circumferential edge (first tensioning device) 
           111  tensioning support surface (first tensioning device) 
           112  inner wall 
           114  hinge 
           116  magnet (second tensioning device) 
           118  tensioning opening (second tensioning device) 
           120  bottom side of the tempering module 
           122  heating mat 
           124  circumferential tensioning recess (second tensioning device) 
           126  tensioning recess (second tensioning device) 
           200  connection unit 
           202  connection unit housing 
           204  connection area