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A bottle assembly including a bottle, a top closure member adapted for releasable engagement with a top portion of the bottle, and a bottom closure member adapted for releasable engagement with a base portion of the bottle. The bottom closure member has a base panel with at least one aperture therei

A bottle assembly including a bottle, a top closure member adapted for releasable engagement with a top portion of the bottle, and a bottom closure member adapted for releasable engagement with a base portion of the bottle. The bottom closure member has a base panel with at least one aperture therein. A diaphragm is positionable between the bottom closure member and the base portion. The diaphragm has at least one sealing element for sealingly engaging the base panel of the bottom closure member and an air passage extending through the at least one sealing element. The diaphragm is moveable between a sealed position and an unsealed position. The air passage is configured to inhibit liquid contained within a liquid chamber of the bottle from entering the air passage when the diaphragm is in its sealed position by trapping air within the air passage.

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1. A bottle assembly having a bottom vent, the assembly comprising: a bottle defining a liquid chamber for holding a quantity of liquid, the bottle having an open bottom, an open top, and a sidewall extending between the open bottom and the open top, the sidewall having a top portion, a base portion

1. A bottle assembly having a bottom vent, the assembly comprising: a bottle defining a liquid chamber for holding a quantity of liquid, the bottle having an open bottom, an open top, and a sidewall extending between the open bottom and the open top, the sidewall having a top portion, a base portion, and middle portion extending between the top and base portions;a top closure member adapted for releasable engagement with the top portion of the bottle for closing the open top of the bottle, the top closure member having an opening for allowing liquid held in the liquid chamber to exit the bottle assembly;a bottom closure member adapted for releasable engagement with the base portion of the bottle for closing the open bottom of the bottle; the bottom closure member having a base panel with at least one aperture therein; anda diaphragm positionable between the bottom closure member and the base portion of the bottle, the diaphragm having at least one sealing element for sealingly engaging the base panel of the bottom closure member and an air passage extending through the at least one sealing element, the diaphragm being exposed to the liquid when liquid is held in the liquid chamber, the diaphragm being moveable between a sealed position wherein the at least one sealing element is sealingly engaged with base panel of the bottom closure member and an unsealed position wherein the at least one sealing element is at least partially disengaged from the base panel of the bottom closure member for allowing air to pass through the air passage of the diaphragm and into the liquid chamber of the bottle, the diaphragm being bowed upward proximate the at least one sealing element for biasing the at least one sealing element against the base panel when in the sealed position, the air passage being configured to inhibit liquid contained within the liquid chamber of the bottle from entering the air passage when the diaphragm is in its sealed position by trapping air within the air passage. 2. The bottle assembly as set forth in claim 1 wherein the base panel of the bottom closure member is generally flat. 3. The bottle assembly as set forth in claim 1 wherein the bottom closure member comprises a seat disposed on the base panel, the seat being configured for engagement with the at least one sealing element of the diaphragm. 4. The bottle assembly as set forth in claim 3 wherein the base panel includes two apertures, each of the apertures being located generally adjacent to the seat. 5. The bottle assembly as set forth in claim 3 wherein the base panel includes an annular shoulder spaced from the seat, the annular shoulder and seat being configured to support the diaphragm. 6. The bottle assembly as set forth in claim 1 wherein the bottom closure member comprises a foot for providing stability to the bottle assembly when the bottle assembly is placed on a generally flat surface. 7. The bottle assembly as set forth in claim 1 wherein the top closure member comprises a nipple and a collar, the collar being adapted to selectively attach the nipple to the top portion of the bottle. 8. The bottle assembly as set forth in claim 1 wherein the diaphragm comprises a roughly disk-shaped portion and an annular rim depending from the disk-shaped portion. 9. The bottle assembly as set forth in claim 8 wherein the diaphragm has a first side and a second side, each side of the diaphragm having a sealing element disposed thereon. 10. The bottle assembly as set forth in claim 9 wherein the diaphragm is substantially symmetric such that the diaphragm is positionable in the bottom enclosure with either one of the sides being exposed to the base portion of a bottle. 11. A bottle assembly having a bottom vent, the assembly comprising: a bottle defining a liquid chamber for holding a quantity of liquid, the bottle having an open bottom, an open top, and a sidewall extending between the open bottom and the open top, the sidewall having a top portion, a base portion and middle portion extending between the top and base portions;a cap for attaching to the top portion of the bottle;a bottom closure member adapted for releasable engagement with the base portion of the bottle for closing the open bottom of the bottle; the bottom closure member having a base panel with at least one aperture therein;a diaphragm positionable between the bottom closure member and the base portion of the bottle, the diaphragm having at least one sealing element for sealingly engaging the base panel of the bottom closure member and an air passage extending through the at least one sealing element, the diaphragm being exposed to liquid when liquid is held in the liquid chamber, the diaphragm being moveable between a sealed position wherein the at least one sealing element is sealingly engaged with the base panel of the bottom closure member and an unsealed position wherein the at least one sealing element is at least partially disengaged from the base panel of the bottom closure member for allowing air to pass through the air passage of the diaphragm and into the liquid chamber of the bottle; anda gap formed between the diaphragm and the base panel of the bottom closure member, wherein the diaphragm is configured to deflect downward into the gap upon freezing of the liquid held in the liquid chamber of the bottle, such that the at least one sealing element is sealingly engaged with the base panel of the bottom closure member. 12. The bottle assembly as set forth in claim 11 wherein the base panel of the bottom closure member is generally flat. 13. The bottle assembly as set forth in claim 11 wherein the bottom closure member comprises a seat disposed on the base panel, the seat being configured for engagement with the at least one sealing element of the diaphragm. 14. The bottle assembly as set forth in claim 13 wherein the base panel has a plurality of apertures therein, each of the apertures being disposed generally adjacent the seat. 15. The bottle assembly as set forth in claim 13 wherein the base panel has an annular shoulder spaced inward from the cylindrical wall of the bottom closure, the annular shoulder and seat being configured to support the diaphragm. 16. The bottle assembly as set forth in claim 15 wherein the diaphragm has a disk-shaped portion and an annular rim depending from the disk-shaped portion, the annular rim being disposed between the annular shoulder of the base panel of the bottom closure member and the cylindrical wall of the bottom closure member. 17. The bottle assembly as set forth in claim 11 wherein the bottom closure member comprises a cylindrical wall extending upward from the base panel, the cylindrical wall and the base panel collectively defining a cup-shaped socket. 18. The bottle assembly as set forth in claim 17 wherein the bottom closure member further comprises a tapered foot extending downward and outward from the socket. 19. The bottle assembly as set forth in claim 11 wherein the at least one sealing element is generally frustum. 20. The bottle assembly as set forth in claim 19 wherein the diaphragm has two axially aligned sealing elements, one of the sealing elements being located on one side of the diaphragm and the other sealing element being located on the other side of the diaphragm. 21. The bottle assembly as set forth in claim 20 wherein the two sides of the diaphragm are substantially identical to each other. 22. A method of venting a bottle assembly having a bottom vent, the method comprising: attaching a bottom closure member to a base portion of a bottle to thereby close an open bottom of the bottle, wherein a diaphragm is captured between the bottom closure member and the base portion of the bottle, the diaphragm having at least one sealing element for sealingly engaging a base panel of the bottom closure member and an air passage extending through the at least one sealing element, the diaphragm being bowed upward proximate the at least one sealing element for biasing the at least one sealing element against the base panel;placing a liquid into a liquid chamber of the bottle;attaching a top closure member to a top portion of the bottle to thereby close an open top of the bottle, the top closure member having an opening therein;drawing liquid through the opening in the top closure member thereby creating a vacuum within the liquid chamber, the vacuum causing the diaphragm to flex from a sealed position wherein the at least one sealing element is in sealing engagement with the base panel of the bottom closure member to an unsealed position wherein the at least one sealing element is at least partially disengaged from the base panel of the bottom closure member for allowing air to pass through the air passage of the diaphragm and into the liquid chamber of the bottle, as the vacuum within the liquid chamber of the bottle approaches ambient pressure the diaphragm moves back to the sealed position thereby preventing further air flow into the liquid chamber and trapping air within the air passage of the diaphragm to inhibit liquid contained within the liquid chamber of the bottle from entering the air passage. 23. The method as set forth in claim 22 wherein more than 50% of the surface area of one side of the diaphragm is subjected to the vacuum within the liquid chamber of the bottle and more than 50% of the surface area of the other side of the diaphragm is subjected to ambient pressure. 24. The method as set forth in claim 23 wherein more than 75% of the surface area of one side of the diaphragm is subjected to the vacuum within the liquid chamber of the bottle and more than 75% of the surface area of the other side of the diaphragm is subjected to ambient pressure. 25. A method of storing liquid in a bottle assembly, the method comprising: attaching a bottom closure member to a base portion of a bottle to thereby close an open bottom of the bottle, wherein a diaphragm is captured between the bottom closure member and the base portion of the bottle, the diaphragm having at least one sealing element for sealingly engaging a base panel of the bottom closure member and an air passage extending through the at least one sealing element, a gap being formed between the diaphragm and the base panel of the bottom closure member;placing a liquid into a liquid chamber of the bottle;attaching a cap to a top portion of the bottle to thereby close an open top of the bottle;freezing the liquid within the liquid chamber of the bottle, the diaphragm being deflected downward into the air gap such that the at least one sealing element is sealingly engaged with the base panel of the bottom closure member as a result of the liquid freezing.