| 摘要 |
A bottle cap is described that includes a sleeve for receiving the neck of a bottle. A gate is slidably mounted in a frame across the top of the sleeve, the gate being slidable between a closed position in which the gate is watertight and an open position in which an aperture in the frame is exposed to allow the flow of liquid therethrough. A strap extends from the gate for moving the gate from its closed position to its open position.
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