| 摘要 |
PURPOSE: A loss-prevention bottle cap is provided, which has no danger of loss and achieves excellent sealing. CONSTITUTION: A loss-prevention bottle cap includes a lower part(IB) of the bottleneck(BB), an upper part(IT) of a bottleneck, a connection unit(CN), and a bottle cap. The upper part of a bottleneck has the same cross-section as that of the lower part. The connection unit connects the upper part and lower part. The connection unit is a hinge. The connection unit includes a soft folding structure. The bottle cap blocks a bottleneck by being inserted in a bottleneck. In the bottle cap inner surface, a groove is formed.
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