Screw cap for bottle has membrane across it which encloses reservoir for liquid or powder, e.g. flavoring, pin being mounted in reservoir which punctures membrane when it is pressed upwards

摘要

The screw cap for a bottle has a membrane (6) across it which encloses a reservoir for liquid or powder (5). This may be a flavoring or a chemical which produces a reaction. A pin is mounted in the reservoir which punctures the membrane when it is pressed upwards.