| 摘要 |
Lid for a beverage cup or the like having a top wall with an opening through which a beverage can be drunk, a valve seat surrounding the opening, a resilient arm beneath the top wall, a valve member urged toward sealing engagement with the valve seat by the resilient arm. The arm is deflected in a downward direction by the lip of a person drinking through the opening to move the valve member away from its seat. In one disclosed embodiment, a portion of the arm extends in proximity to a deformable side wall and is deflected by the lower lip of the person. In other embodiments, the valve member extends through the opening and is depressed by the upper lip, and in one of those the lid is incorporated into a beverage can.
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