| 摘要 |
A tamperproof double cap, capable of being used to add an additive, comprises: a lower cap, which is coupled to close the mouth of a beverage container, is provided with an additive storage cavity in the middle thereof, and has a hinge split notch in the bottom of the storage cavity; and a press cap, which is fitted into the storage cavity, and separates the hinge split notch when pressed. The lower cap is provided with first and second lips formed on the upper end of the storage cavity holding a tubular part of the press cap, and has vertical ribs protruding from the inner wall of a cavity tube defining the storage cavity at regular intervals. The press cap includes grooves formed in the tubular part so as to vertically move along ribs of the lower cap, and an external press thread in the upper outer circumference thereof so as to apply a vertical movement force. An upper cap encloses the press cap and the first and second lips, and includes an external thread, which is screwed with the external press thread and vertically moves the press cap when rotated.
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