| 摘要 |
A container with a multi-step pressure jet effect is provided to restrain carbonic acid gas from being discharged suddenly by relieving shock generated in initially jetting the carbonic acid gas, by forming a multi-step waved vent groove at an upper rim of an injecting port. A container with a multi-step pressure jet effect has a screw part(23) formed at a neck portion(20) and sealed by a cap. Plural multi-step waved vent grooves(22a) are at an upper rim(22) formed at an upper injecting port of the neck portion of the container. The vent grooves are formed in multiple depths by differently forming the depth in order. The waved vent grooves are formed around the whole of the upper rim at 360°.
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