| 摘要 |
A drink-through plastic lid is injection molded in one piece to define a rim structure which snaps onto the rim of a cup and an asymmetric crown having a drink-through opening formed at the high point of an outer deck. An integral hinged flap with a C-shaped seal lip on the inside surface can lock by means of said lip into the drink-through opening when in one condition. The flexible outer edges of the flap latch into a lock-back recess which interrupts an intermediate inner deck formed between the outer crown deck and the floor of a well in the interior area of the lid.
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