| 摘要 |
Apparatus and methods are provided for selectively dispensing first and second liquids from a bottle. A cap including a first opening is coupled to a mouth of the bottle, and a first valve is coupled to the first opening. The first valve includes a first position, wherein the first liquid may be dispensed from the bottle, and a second position, wherein the first liquid is substantially sealed in the bottle. A container containing a second liquid is coupled to the first opening. The container includes a second opening, and is adapted to be inserted through the mouth into the bottle. A second valve is coupled to the second opening. The second valve is adapted to close when a difference between a pressure inside the container and a pressure outside the container is less than a predetermined amount, and to open when the pressure difference is greater than the predetermined amount, wherein the second liquid may be dispensed from the container when the first valve is in the closed position.
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