A bottle cap, especially an overpressure protection bottle cap for a beer bottle or other pressure bottle type container, including a cap top, a cap edge, and a gasket in the cap, in order to prevent the internal pressure of the bottle type container from exceeding its bearing capacity At times, explosion accidents were invented, and pressure relief holes were provided on the top of the cover. Pressure relief plates with lower compressive strength than the bottle body were sandwiched between the inside of the cover top and the gasket. The technical scheme has the advantages of simple manufacture, easy promotion and the like.
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