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Bulgeable cap of coke / cap of coke bottle

Bulgeable cap of coke

PROBLEM:
The pressure in the bottle will rise while the coke bottle suffering a severe shaking, liquid will splashed everywhere if you opened the coke. It’s awkward.
but it is difficult to see the change of internal pressure,
SOLUTION:
We designed the cap of coke bottle which has bulgeable cap.
The cap will bulge when the pressure rise.

University

Beijing Institute of Technology

Beijing Institute of Technology
Beijing, China