| 摘要 |
PURPOSE: A bottle cap is provided to avoid the waste of empty bottles by attaching a cap for preventing impurities from penetrating into the bottles. CONSTITUTION: A bottle cap is fitted into the inner wall of an opening of an empty bottle, and the cap is inserted when the bottle is forwarded. The cap is separated and collected for washing the bottle. The cap is made of soft plastic or aluminum. By attaching the cap preventing the input of such impurities as a cigarette butt and other wastes to the bottle, the bottles are recycled and the waste of bottles is reduced.
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