| 摘要 |
This invention is about the manufacturing of an envelope cup that can be manufactured quickly and opened easily by making a projected vertical junction(2) in the side part(1). The notable feature of this invention is the vertical junction(2) that can be pulled from the side part(1) to function as a pullout handle. It is folded down to one side of the cup while stored but can be pulled to easily open the envelope cup.
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