| 摘要 |
The invention provides a screw cap for a container wherein the cap has inner and outer sleeves, with a sealing member within, integral and transverse to the inner sleeve. The inner sleeve and sealing member are of hard plastics material, but the sealing member is thin enough to be sealingly resilient. A chamber between the sealing member, and a closed end of the outer sleeve prevents diffusion of aroma through the cap from the container.
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