| 摘要 |
A closure assembly for a water bottle, having a cap including a mouthpiece that has a first aperture through which water in the bottle can flow out upon the application of suction at the mouthpiece. A support inside the mouthpiece has at least one second aperture that, together with the first aperture, defines a path for water. Also included is a valve member that has a diaphragm located between the mouthpiece and the support. The diaphragm has an aperture in the path and bears resiliently against the support when no suction is applied to the mouthpiece, so its aperture is closed, blocking the path. Upon the application of suction at the mouthpiece, the diaphragm is deformed and moves away from the support so the aperture in the diaphragm is opened to permit the flow of water.
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