Abstract:
An oral feeding bottle includes a feed container with an open end and surfaces adapted to come into contact with a liquid feed in the container, a teat releasably connected to the open end and adapted to contact both the liquid feed and a person or animal feeding from the bottle, and a cap with two modes of operation, where in the first mode, the teat is connected to the container and the cap is adapted to fit over, enclose the teat, and be releaseably connected to the feed container, and where in the second mode, the cap includes a means for stowing the teat in a non-dispensing position spaced from the container, where the teat and the surfaces that contact the liquid feed are in fluid communication so that the teat and the feed container are sterilized with a fluid sterilizing medium disposed in the container.

Description:
FIELD OF THE INVENTION  
         [0001]    This invention relates to oral feeding bottles and more particularly to a novel sterilisable oral feeding bottle and a method of sterilisation therefor.  
         BACKGROUND OF THE INVENTION  
         [0002]    There are a wide variety of infant oral feeding bottles on the market. In general, their components comprise a feed container, which is usually transparent and made of glass or plastics material, the container having at its open end a neck to which is releasably connected a feed dispensing means, usually a teat, formed of rubber or plastics material. The feed container is usually provided with a screw thread about its neck, and a threaded retaining collar is used to connect the feed dispensing means to the container.  
           [0003]    Other components which can form part of a conventional infant oral feeding bottle include a sealing disc, which is used to cover the open end of the feed container when the feeding bottle is not in use, and a dormal cap which is a press fit on the retaining collar and is shaped in order to accommodate and protect the feed dispensing means when it is connected in its operative position.  
           [0004]    After each feed it is important that the infant oral feeding bottle component parts should be sterilised, and a wide variety of sterilisers and sterilisation methods have been proposed. The term “sterilisation” for this purpose is used to indicate a certain standard which is generally accepted as being capable of killing the harmful bacteria that might be dangerous to young babies if such bacteria were to come into contact with the feed. This standard is more correctly called “disinfection”. Most of the products and methods which have been proposed, however, are called respectively “sterilisers” and “sterilisation” and this is the term which will henceforth be used in this document.  
           [0005]    It is generally accepted that moist heat, steam or water at 80° C. for one minute on the surface of the components of the feeding bottle is sufficient to kill harmful bacteria and to sterilise the bottle components for use.  
           [0006]    One method of sterilisation which is commonly used is to use a chemical bath into which the components are totally submerged for at least 30 minutes. This has the disadvantage that it takes a long time, and the recommended time period has to be restarted if further components are added to those already submerged. In addition, all traces of the chemical have to be removed as the chemical is harmful to ingest. For this reason, it is recommended that the bottle components are rinsed in recently boiled water after sterilisation, which can itself give rise to possible to re-infection.  
           [0007]    Electrical sterilisers are also commercially available, and typically these can comprise an enclosed container capable of receiving six feeding bottles in disassembled state. A predetermined quantity of water, usually 30 ml or 40 ml is placed on a heater dish and boiled dry. The steam created sterilises the surfaces of all the feeding bottle components. The process takes from five to ten minutes, and is thus quicker than the chemical method, and probably more reliable, but does require a relatively expensive electrical device. The device is considerably more expensive than an electrical kettle, for example.  
           [0008]    A further method which has been proposed is to place all of the feeding bottle components into a vessel together with a quantity of water, and to boil the water by placing the container in a microwave oven for a specific period sufficient to create steam within the vessel. The process takes approximately 10 minutes as the bottle components and the vessel itself also absorb heat, thus delaying the rise in temperature of the water.  
           [0009]    Other sterilisation methods use a carrier for the feeding bottle components which is placed in a container over a pan of water so that the steam rises into the container as the pan of water is brought to the boil, eventually sterilising all the components. This is a fairly lengthy procedure. Alternatively, all the feeding bottle components are placed in a pan of boiling water and the water kept boiling for some time. If, in this latter method, some of the components are made of plastics that float or contain air bubbles that allow them to float, it cannot be established exactly how long they must stay in the boiling water in order to sterilise them.  
           [0010]    As will be seen from the above, all of the known sterilisation methods use either expensive equipment, or potentially harmful chemicals, or take a considerable time to sterilise the components of a feeding bottle.  
         BRIEF SUMMARY OF THE INVENTION  
         [0011]    According to the present invention, instead of placing water in a separate vessel, and then loading the feeding bottle components into this vessel, closing it and boiling the water either by an electrical heated dish or by a microwave oven, the sterilising fluid is introduced into the feed container to be sterilised, or into a novel cap which is releasably connectable to the open end of the feed container.  
           [0012]    In a first aspect, the invention provides an oral feeding bottle, comprising a feed container having an open end and a feed dispensing means releasably connectable therewith, and a cap, adapted to fit over the open end of the feed, container and to be releasably connected to the feed container, the cap being provided with means for stowing the feed dispensing means when the feed dispensing means is released from the container, whereby, when the cap is connected to the container, sterilisation of the feed dispensing means and the feed container can be carried out with a sterilising medium.  
           [0013]    In another aspect, the invention provides a method for sterilising an oral feeding bottle, the bottle comprising a feed container having an open end and a feed dispensing means releasably connectable therewith, wherein a sterilising chamber is formed from the feed container and a cap releasably engagable therewith, the chamber so formed enclosing the feed dispensing means, whereby sterilisation of the feed dispensing means and the interior of the feed container can take place using a sterilising medium disposed within the chamber.  
           [0014]    In a further aspect, the invention provides a cap for an oral feeding bottle, the bottle comprising a feed container having an open end and a feed dispensing means releasably connectable therewith, the cap being adapted to fit over the open end of the container and to be releasably connectable therewith, wherein the cap is provided with means for stowing the feed dispensing means when the feed dispensing means is released from the container and the cap is connected to the feed container, whereby sterilisation of the feed dispensing means and the interior of the feed container can be carried out with a sterilising medium.  
           [0015]    The feed container comprises a hollow body, which for example, can be cylindrical or square shaped in cross-sections. The feed container may be transparent and formed from glass or a plastics material, and can be provided with a neck and shoulder at its open end. The feed container can also desirably be provided with a graduated scale indicating the volume of the contents.  
           [0016]    The open end or neck of the feed container is preferably provided with a screw thread co-operable with a screw threaded retaining collar for connecting the feed dispensing means to the feed container. The feed dispensing means normally is a teat or spout which can be formed from a rubber or plastics material. The teat or spout can be provided with a circumferential flange which is gripped by the retaining collar and serves to secure the teat to the open end of the feed container.  
           [0017]    Other optional components of the oral feeding bottle of the invention include a sealing disc, which can co-operate with the retaining collar to seal the feed container, optionally with the teat or spout inverted therein.  
           [0018]    In a yet further aspect of the invention a pair of tongs are provided for handling the sterilised components of the oral feeding bottle. According to this aspect of the invention, an oral feeding bottle comprises a feed container having an open end, feed dispensing means releasably connectable therewith, a cap adopted to fit over the open end of the feed container, and a pair of tongs adapted to be stowed in the cap in such a manner that the cap can still be connected to the feed container. Finally, in certain embodiments a dormal cap of conventional type can also be used.  
           [0019]    In a particularly preferred embodiment of the invention, all the de-mountable components of the oral feeding bottle other than the feed container can be stowed in the cap of the invention. Preferably the cap is adapted to be a press fit onto a shoulder, or onto one or more peripheral projections, on the feed container.  
           [0020]    The cap of the invention can take the place of the conventional dormal cap normally supplied with an oral feeding bottle, or can be adapted to receive a conventional dormal cap stowed therein. Preferably the cap of the invention is adapted to be releasably connectable to the feed container in such a manner that the threads surrounding the open end or neck of the feed container can also be treated by the sterilising medium and can be protected from contamination until all the components of the oral feeding bottle are re-assembled. Assembly of the components of the oral feeding bottle can conveniently be carried out using the tongs previously referred to, without the need to handle any of the components.  
           [0021]    The means for stowing the feed dispensing means and other components of the oral feeding bottle within the cap can, for example, comprise webs, projections, indents, ledges, shoulders and other shaped configurations for receiving, and preferably retaining, components of the oral feeding bottle. It will be appreciated that the means for stowing the components within the cap are preferably as simple as possible, and should, as far as possible, be devoid of re-entrant and undercut portions which might provide regions difficult to sterilise or make the cap difficult to mould. It will also be appreciated that, whilst the means for stowing the components of the oral feeding bottle are disposed within the cap of the invention, the components when stowed need not be wholly within the cap and, for example, the teat may protrude into the interior of the feed container.  
           [0022]    In another preferred embodiment of the invention, the tongs may, but need not necessarily, be omitted, and the components stowed within the cap in such a manner that the cap can be pushed down over the open end of the feed container to bring the retaining collar into abutment with the neck of the feed container. In the embodiment, the cap and collar can, for example, be turned in order to connect the collar to the neck of the feed container. The collar and neck portion can, for example, be provided with inter-engaging threads. The components can be so assembled in the cap that, for example, the collar connects either the feed dispensing means, or the sealing disc, or both, to the neck of the feed container. Thus the cap can be used to offer the collar, together with the feed dispensing means, or the sealing disc, or both, to the feed container for connection, without the need to handle any of these components.  
           [0023]    It is important that, when the components of the oral feeding bottle are stowed in the cap of the invention, as far as possible all their surfaces should be freely accessible to the sterilising medium.  
           [0024]    In a preferred embodiment of the invention, sterilisation of the oral feeding bottle is carried out using a microwave oven. Thus, for example, a small quantity of water can be disposed within the feed container or the cap of the invention, and the cap with the other components of the oral feeding bottle stowed therein, and the feed container, can be assembled together. The bottle can then be placed within a microwave oven, either upright, or tilted on its side, or inverted, and the water boiled by activating the oven for a specific time, in general, about 10 ml to 100 ml, preferably 15 ml to 30 ml, for example, about 20 ml of water is used in the method of the invention, and boiled for from 1 to 5 minutes per bottle. Although less preferred, it would be possible to use a sterilising chemical fluid in place of the boiling water, thereby avoiding the use of a microwave oven. However, a larger quantity of fluid may need to be used, and the time taken would be much longer.  
           [0025]    From the above description it can be seen that the cap of the invention, when attached to the feed container, in effect forms a sterilising chamber. Any number of oral feeding bottles according to the invention, each containing the requisite amount of water, can be placed in a microwave oven and sterilised by boiling the water. When the microwave oven is activated, the boiling water creates steam which is able to surround the components stowed in the cap of the invention, and preferably also the thread around the open end or neck of the feed container as well as sterilising the interior of the feed container itself. Thus all the components that are in direct contact with the feed to be given to the infant can receive the moist heat in order to sterilise their surfaces. The only areas that are not fully exposed to the sterilising moist heat are the outside base of the bottle and the outside of the cap of the invention. These areas are in any case likely to be subject to contamination by handling, or storage in a refrigerator, after sterilising in any conventional steriliser.  
           [0026]    It can be seen that, in the method of the invention, the cap of the invention can keep all of the sterilised components of the oral feeding bottle and their surfaces protected until the feed is disposed in the feed container. Even at this stage, by use of the tongs as previously discussed, the teat retaining collar and sealing disc need not be handled, but can be placed in the desired position using the tongs.  
           [0027]    In the preferred method of the invention, in which sterilisation is carried out using steam, preferably by placing the oral feeding bottle within a microwave oven, the bottle is preferably provided with means for venting excess steam and preventing a build up of pressure within the sterilising chamber formed by the feed container and the cap of the invention. The venting means can comprise, for example, one or more small holes, or apertures in the wall of the cap of the invention. Alternatively, a discontinuity can be provided, in either the cap or the exterior of the feed container, whereby steam can escape between the cap and the exterior wall of the feed container. In one embodiment, for example, the feed container can be provided with a projecting lip or ridge over which the cap of the invention is a press fit. Discontinuities or recesses in either the cap or the lip at the point of engagement can provide convenient venting means for escape of excess steam and also allow any remaining water to be emptied from the feeding bottle after sterilisation. Alternatively, the cap may be provided with a valve for this purpose.  
           [0028]    In a further embodiment, the cap of the invention can be provided with one or more projecting legs or ledges at one or more sides thereof, whereby the oral feeding bottle can be laid down at an angle to the horizontal to minimise the possibility of water draining out of the neck of the feed container during the sterilisation procedure. This would be more likely to occur if the bottle were laid completely horizontally, as may be necessary in some smaller microwave ovens. In certain embodiments, the water to be boiled can be placed in the cap of the invention, and the bottle assembly inverted to stand on the cap, with the feed container extending above it.  
           [0029]    In another preferred embodiment, the cap of the invention can be provided with an additional grid in order to receive and retain the components to be stowed. This embodiment is particularly useful if the feeding bottle has a conventional dormal cap and enables the cap of the invention to be used with a conventional oral feeding bottle. In this embodiment, the cap of the invention may be provided with an ejector device to enable the components of the oral feeding bottle, particularly the conventional dormal cap, to be ejected from the cap of the invention, for assembly in the normal way. The grid can also, if desired, carry the projecting leg or ledge for supporting the bottle when laid on its side. The grid can be, for example, a press fit, a screw fit, or an interference fit in the cap.  
           [0030]    In order to re-assemble the components of the bottle without introducing contamination it is preferred to use a pair of tongs as previously described. When the tongs are stowed in the cap of the invention, it is desirable that they can be readily accessed, preferably without first removing the other components.  
           [0031]    Accordingly, in another preferred embodiment, the cap of the invention is in two separable parts, preferable comprising a body portion and a removable sub-top. The tongs can then be stowed in the sub-top or at the top of the body portion, so that they are visible and readily accessible on removal of the sub-top. The sub-top can be, for example, a press fit on, hinged to, or screwed on, the body portion of the cap. Removal of the sub-top can make it easier, or possible, to use the body portion of the cap to connect the retaining collar to the neck of the feed container without the need to handle the collar, as previously described.  
           [0032]    Preferably, the feed dispensing means, when disposed in the cap, can be engaged with the container for assembly of the feed container without the need for other contact with the feed dispensing means. When a sub-top is provided, said feed dispensing means may be engaged with the feed container through an opening of the cap to which the sub-top is connected.  
           [0033]    Moreover, the retaining collar, when disposed in the cap, can preferably be engaged with the container for assembly of the feed container without the need for other contact with the retaining collar. In this event, said retaining collar and cap may have respective interengagable detent means preventing relative rotation thereof, whereby rotation of the cap permits screw-threading of the collar onto the threaded portion of the neck of the container.  
           [0034]    In still another preferred embodiment of the invention, the sealing disc is stowed within the cap in such a manner that it blocks the outlet of the feed dispensing means when the feed dispensing means is connected to the feed container. Thus if the feed container containing liquid feed should be knocked over, the sealing disc can prevent or reduce the loss of liquid feed through the outlet of the feed dispensing means. This is yet another separate aspect of the invention. In this embodiment, the sealing disc and the tongs are both preferably stowed in the sub-top. The sealing disc is preferably stowed in the sub-top in such a manner that it can be dislodged by tilting, for example, by applying pressure to one side of a face of the disc. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0035]    A number of preferred embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:  
         [0036]    [0036]FIG. 1 shows a prior art oral feeding bottle in exploded side elevation;  
         [0037]    [0037]FIGS. 2 a  and  2   b  show a first embodiment of an oral feeding bottle according to the invention; FIG. 2 a  shows the assembled bottle in sectional side elevation; FIG. 2 b  shows a view inside a cap shown in FIG. 2 b  in the direction of arrow a, with the teat removed showing the positions of the sealing disc, tongs and threaded collar;  
         [0038]    [0038]FIG. 3 shows a second embodiment of an oral feeding bottle according to the invention in sectional side elevation and in the sterilising mode;  
         [0039]    [0039]FIGS. 4 a  and  4   b  show a further embodiment of an oral feeding bottle according to the invention; FIG. 4 a  shows the assembled bottle in sectional side elevation; FIG. 4 b  is a fragmentary sectional side elevation which shows an alternative dormal cap ejector for the cap of FIG. 4 a;    
         [0040]    [0040]FIGS. 5 a - 5   d  show a still further embodiment of an oral feeding bottle of the invention, wherein the cap is provided with a removable sub-top; FIG. 5 a  shows the oral feeding bottle in feeding mode; FIG. 5 b  shows the same bottle in sterilising mode; FIG. 5 c  shows a view inside the sub-top of the cap of FIG. 5 a  in the direction of arrow b; and FIG. 5 d  shows the tongs when released from the cap;  
         [0041]    [0041]FIGS. 6 a - 6   e  show a still further embodiment of an oral feeding bottle according to the invention; FIG. 6 a  shows the bottle in feeding mode; FIG. 6 b  shows the bottle in sterilising mode; FIG. 6 c  shows a view inside the sub-top of the cap of the bottle; FIG. 6 d  shows the sub-top of the cap in sectional side elevation; and FIG. 6 e  shows the tongs when removed from the sub-cap;  
         [0042]    [0042]FIGS. 7 a - 7   e  show another embodiment of an oral feeding bottle according to the invention in sectional side elevation; FIG. 7 a  shows the bottle in feeding mode; FIG. 7 b  shows the bottle inverted and in sterilising mode; FIG. 7 c  shows a plan view of the cap in the direction of arrow c; FIG. 7 d  shows the tongs when released from the cap; and FIG. 7 e  shows the sealing disc in sectional side elevation; and  
         [0043]    [0043]FIGS. 8 a - 8   c  show still another embodiment of-an oral feeding bottle according to the invention in sectional side elevation; FIG. 8 a  shows the bottle in feeding mode; FIG. 8 b  shows the bottle inverted and in sterilising mode; and FIG. 8 c  shows the tongs when released from the cap.  
         [0044]    [0044]FIGS. 9 a - 9   d  show yet another embodiment of an oral feeding bottle according to the invention in sectional side elevation; FIG. 9 a  shows the bottle in feeding mode; FIG. 9 b  illustrates the bottle in sterilising mode; FIG. 9 c  shows a section of the sub-top along the line A-A, and also shows the removal of the sealing disc from the sub-top; and FIG. 9 d  illustrates the removal of the sub-top from the cap.  
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0045]    Referring now to the drawings, FIG. 1 shows a typical conventional infant oral feeding bottle, illustrated generally at  1 . The bottle comprises a transparent plastics feed container  2  which is of generally cylindrical shape and has a shoulder  3  leading to a neck portion  4  provided with a threaded section  5 . Co-operable with the threaded section  5  is a threaded collar  6  adapted to receive within a central aperture of the collar a flexible rubber or plastics teat  7  and to engage with a flange  8  on the teat  7 . Also provided is a sealing disc  9  with a flange  10  which can also engage with the threaded collar  6  when the bottle is not in use. The teat  7  is in this case inverted and lies inside the bottle  2 , the flange acting as a seal between the neck  4  and disc flange  10 . Finally, the teat and collar assembly can be surmounted by a dormal cap  11  which is a press fit on the outside of the threaded collar  6 .  
         [0046]    Referring now to FIGS. 2 a  and  2   b,  there is shown a first embodiment of an oral feeding bottle according to the invention, illustrated generally at  20 . The bottle comprises a feed container  21  of generally cylindrical shape, having a shoulder  22  and a neck portion  23  with a threaded section  24 . Below the shoulder  22  are a series of circumferentially positioned projections  25  which act as press fit locating points for a cap  26 . The cap  26  has a lip  27  with an internal groove  28  co-operable with the projections  25  so that the cap is a press fit on the feed container  21 .  
         [0047]    Within the cap, longitudinally extending webs  29  receive threaded collar  30 , and serve to locate sealing disc  31  and flexible tongs  32 . Teat  33  is located in the cap by gripper means  34 .  
         [0048]    It can be seen that the components of the oral feeding bottle, other than the feed container, are disassembled and located within the cap  26  in such a manner that their surfaces are exposed for sterilisation. The threaded region  24  of the feed container is also available to be sterilised.  
         [0049]    In use, a small quantity of water  35  is placed in the feed container  21  and the cap and-components located in position. The bottle can then be placed in a microwave oven and the water  35  heated to create steam which rises into the cap and sterilises the components located therein. Build up of excess steam pressure is vented through the annular space between the grooved lip  27  and the exterior wall of the feed container  21 .  
         [0050]    The oral feeding bottle shown in FIG. 3 and illustrated generally at  40 , is similar to that of FIGS. 2 a  and  2   b,  except that the cap  41  is provided with a laterally extending leg  42  on which the feeding bottle  40  can be stood at an angle to the horizontal. This permits the feeding bottle to be stood on its side without the risk that the water  43  disposed in the feed container  44  will escape via the neck  45  and past the lip  46 .  
         [0051]    An embodiment of a cap according to the invention, which can be used with a conventional oral feeding bottle, is illustrated in FIGS. 4 a  and  4   b.  The oral feeding bottle, illustrated generally at  50 , comprises a conventional feed container  51  having a shoulder  52 , a neck  53  and a threaded neck section  54 . Also illustrated are threaded collar  55 , teat  56  and dormal cap  57  of the conventional oral feeding bottle. The cap of the invention  58  is seated upon means for stowing the cap in the form of a grid  59  which has a collar  60  which has a small clearance over the threaded section  54  of the feed container  51 , and rests upon the shoulder  52 . The grid may be retained on the feed container, for example, by projecting lugs  73 . The grid  59  has an upstanding cone-shaped web  61  upon which the threaded collar  55  is seated, and has a central pillar  62  for locating the teat  56 . The dormal cap  57  is held in position by webs  63  on the cap  58 .  
         [0052]    The cap  58  is also provided with a dormal cap ejector  64 ,  65 , two embodiments of which are illustrated in FIGS. 4 a  and  4   b.  In each case, pressure on the flexible domed section,  66 ,  67  forces a pin  68 ,  69  into the cap and into contact with the top of the dormal cap  57 , thereby ejecting it from the cap  58 . In FIG. 4 a  the dormal cap ejector  64  is integral with the cap  58 , whereas in FIG. 4 b  the dormal cap ejector  65  is a separate part and the pin  69  passes through a hole  70  in the recessed top  71  of the cap  72 .  
         [0053]    Turning now to FIGS. 5 a - 5   d,  there is shown a compact version of an oral feeding bottle according to the invention. The bottle, illustrated generally at  80  has a feed container  81 , of generally cylindrical shape, having a shoulder  82 , and a neck portion  83 , with a threaded section  84 . A threaded collar  85  co-operates with the threaded section  84  and retains the flange  86  of a teat  87  on the neck of the feed container  81 . The bottle is provided with a cap  88 , which in this case also acts as a dormal cap. The cap is formed from a plastics material and is in two parts, a lower cylindrical section  89  and an upper sub-top  90 . The parts  89  and  90  are a press fit together. A sealing disc  91  and tongs  92  are located inside the cap as shown, and, in the case of the sealing disc, location is provided by webs  93  extending from the wall of the cap.  
         [0054]    In feeding mode, the oral feeding bottle is shown in FIG. 5 a.  To provide the feed to the infant it is merely necessary to remove the cap  88  together with the components located therein.  
         [0055]    In sterilising mode, the threaded retaining collar  85  is removed together with the teat  87 . These are both then located within the cap  88 , in the case of the teat  87  in an inverted position. A small quantity of water  94  is then placed in the feed container  81  and the cap  88  replaced, the lip  95  of the cap locating on a projecting collar  96  on the neck  83  of the feed container  81 . Again it can be seen that all the components of the oral feeding bottle are disposed within the cap in such a manner that steam from the boiling water in the feed container can easily reach all the surfaces of the components. The cap  88  is formed in two parts for ease of manufacture and also in order to enable the sub-top  90  to be removed for ready removal of the tongs  92  and the sealing disc  91 . The tongs  92 , shown open in FIG. 5 d,  are retained in the cap  88  by resilient opening pressure of the tongs against the inside walls of the sub-top.  
         [0056]    [0056]FIGS. 6 a - 6   e  show another embodiment of an oral feeding bottle according to the invention, this time of standard height. The feeding bottle, illustrated generally at  100 , is substantially identical to the bottle of FIG. 5, and is similarly provided with a two-part cap  101  of which a sub-top  102  is removable. The stowage of the components within the cap  101  for sterilisation is substantially the same as that shown in FIG. 5. Extending collar  103 , upon which the cap  101  is a press fit, is provided with recessed cut-out portions  104  around its circumference, in order to allow for the venting of excess steam and water. The rim of the cap  105  is only a loose fit on the shoulder  106  of the feed container  107 , and thus steam passing through the cut out portions  104  can easily vent to the atmosphere.  
         [0057]    A further embodiment of an oral feeding bottle according to the invention is shown in FIG. 7 FIGS. 7 a - 7   e.  Again, the feeding bottle, illustrated generally at  120  comprises a feed container  121  and a cap  122 . As illustrated in FIG. 7 a,  in feeding mode a sealing disc  123  is removed and optionally also arcuate tongs  1124 . The cap  122  acts as a conventional dormal cap and is removed for feeding.  
         [0058]    In sterilising mode, the components are assembled and stowed in the cap  122  as shown in FIG. 7 b,  with the sealing disc  123  and threaded retaining collar  124  located on circumferential webs  125  formed by scalloped indentations in the peripheral wall of the cap  122 . The teat  126  rests on projections  127  on the threaded collar  124 , and the tongs  1124  rest against a detent  128  in the wall of the cap  122 .  
         [0059]    In sterilising mode, a small quantity of water  129  is placed in the cap, which can have a fill level indicator and the container, cap and components are assembled together. The bottle  120  is then placed in a microwave oven for sterilisation in the same manner as previously described.  
         [0060]    [0060]FIGS. 8 a - 8   c  show a further embodiment of a standard size bottle fitted with a cap according to the invention. The bottle, illustrated generally at  130 , is fitted with a cap  131  similar to that shown in FIGS. 7 a - 7   e.  As before, the cap provides means for locating sealing disc  132 , threaded collar  133  and teat  134  in inverted positions, and provides a peripheral location for flexible arcuate tongs  135 . As with the embodiment of FIGS. 7 a - 7   e,  the bottle of FIGS. 8 a - 8   c  is inverted in order to carry out the sterilisation procedure.  
         [0061]    [0061]FIGS. 9 a - 9   d  show a further embodiment of an oral feeding bottle according to the invention, illustrating the function of the sealing disc and its removal from the sub-top, and also the use of the body portion of the cap to screw the retaining collar onto the threaded neck portion of the feed container.  
         [0062]    [0062]FIG. 9 a  shows an oral feeding bottle illustrated generally at  140  comprising a feed container  141  and a cap of the invention  142 , which in this case also fulfills the function of a dormal cap. The cap  142  has a body portion  143  and a sub-top  144 .  
         [0063]    A teat  145  is connected to the feed container  141  by a threaded collar  146  which engages with a threaded portion  147  on the neck  148  of the feed container  141 . In the feeding mode, as illustrated in FIG. 9 a  sealing disc  149  is stowed within the sub-top  144  and rests on webs  150  and  151 . In this position, it blocks the hole or holes  152  at the top of the teat  145 , thus preventing any liquid feed from spilling out of the teat if the bottle is knocked over.  
         [0064]    The sub-top  144 , which is either a snap-fit, or is screwed, hinged or pivoted to the body portion  143 , can be removed as illustrated in FIG. 9 d.  Removal of the sub-top  144  exposes the sealing disc  149  for removal. The sealing disc  149  can be removed by pressure on the edge surface  162 , which causes the sealing disc to pivot about the webs  150  and dislodges the disc from frictional engagement with the webs  151 . The sealing disc can then be removed.  
         [0065]    The position of the components in the sterilising mode is shown in FIG. 9 b.  Both the retaining collar  146  and the teat  145  are located by means of webs  153 . By a suitable shaping of the wall  154  of the body portion of the cap  142  such that it is an interference fit with the threaded retaining collar  146 , it would be possible to use the body portion of the cap to screw the threaded collar  146  onto the threaded portion  147  of the neck of the feed container  140 . In use, the body portion  154  as illustrated in FIG. 9 b  would first be detached from the sub-top  144  and inverted over the feed container  141  in order to place the teat  145  on the neck  148  of the feed container. (Alternatively, tongs (not shown in FIGS. 9 a - 9   d ) could be employed to place the teat inverted in the bottle for its transportation mode, whereupon the sealing disc  149  is placed on top of the flange  163  of the teat). In either event, the body portion is then inverted again, and placed over the teat (or sealing disc) in order to bring the threaded collar  146  in register with the neck  148  of the feed container. Turning the body portion  154  screws the threaded collar  146  onto the threaded portion  147  of the neck  148 , thereby securing the teat  145  to the feed container. For this purpose, some detent means, (not shown) is provided to prevent relative rotation of the cap and collar when the collar is stowed in the cap.  
         [0066]    A clearance  164  is provided between lip  166  of the cap body  154  and shoulder  168  of the bottle  141  to enable some vertical movement of the cap body  154  and collar  146  while their threads engage. Thereafter, the threads themselves will draw the collar down as the collar is screwed on. Also, lip  166  needs to be sufficiently distanced from the webs  153  to enable it to snap over detent lip  170  of the bottle  141 , even when the respective ends of the threads on the collar and bottle neck are in register with one another.  
         [0067]    The reader&#39;s attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.  
         [0068]    All of the features disclosed in this specification including any accompanying claims, abstract and drawings, and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.  
         [0069]    Each feature disclosed in this specification including any accompanying claims, abstract and drawings, may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.  
         [0070]    The invention is not restricted to the details of the foregoing embodiments. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification including any accompanying claims, abstract and drawings, or to any novel one, or any novel combination, of the steps of any method or process so disclosed.