| 摘要 |
A drinking cup assembly having a cup having an open end, a cap adapted to enclose the open end, the cap having a drinking spout and an air vent and a pair of mating surfaces that align with the drinking spout and the air vent, and a removable flow control valve adapted to engage the mating surfaces. The cap has a retaining mechanism that in conjunction with one mating surface secures in place the flow control element when not in use.
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