| 摘要 |
The bottle cap of the present invention consists of a first cap and a second cap fitted into the depressed portion of the first cap. The first cap includes a circumference portion formed so as to embrace the outer circumference of the neck of the bottle and a top edge portion formed on the top edge of said circumference portion so as to close the neck of the bottle. The top edge portion includes a depressed portion depressed downward so as to form a sidewall that comes into airtight contact with the inner circumference of the neck of the bottle. The second cap includes an insert portion inserted into the depressed portion and an elongated portion elongated outwardly from a top of the insert portion. Such a bottle cap provides an effect that sealability between the inside and outside of the neck of the bottle and the bottle cap can be improved.
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