| 摘要 |
PURPOSE: A plastic bottle with a mouth is provided to reduce the weight of the weight of a bottle mouth while maintaining the strength of the bottle mouth by including the bottle mouth having a screw part and a support ring. CONSTITUTION: A plastic bottle comprises a bottle mouth(2) including a circumferential wall. A unit bottle mouth comprises: a screw part(16) which is included on the outer circumference of the circumferential wall; a supporting ring(20) which is projected from the outer circumferential under the screw part; and punch parts(24) which are included on the circumferential wall. The punch parts are separated from screw threads of the screw part and the supporting ring.
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