Patent ID: 7040515

Claim:
A bottle cap for fitting on a bottle including a mouth and an inner volume, the bottle cap comprising: a cover securable over the bottle mouth, the cover having an outer surface and an inner surface; a valve housing extending from the cover inner surface and positioned to be open to the bottle inner volume when the cap is secured over the mouth; a liquid flow port passing through the valve housing and the cover extending between a first opening on the valve housing and a second opening on the cover outer surface; an air supply passage extending between the cover outer surface and the valve housing; a plunger disposed in the valve housing and moveable between a blocking position blocking air flow through the air supply passage and blocking liquid flow from the first opening to the second opening of the liquid flow port and an open position permitting air flow through the air supply passage and liquid flow from the first opening to the second opening of the liquid flow port, the plunger including a drive end accessible though the second port and the plunger being biased into the blocking position but movable into the open position by applying force against the drive end, wherein the second port is sized to fit over a feed tube spike of a liquid dispensing support such that the feed tube spike is employed to apply force against the drive end of the plunger to move the plunger into the open position.