a system for releasing a contained volume of gas . the system has a base with a pressure - release vent positioned within a flex region and a seal to disengagably seal the pressure - release vent . the seal has a gas vent path that extends from the pressure - release vent . the contained volume of gas passes through the gas vent path to apply force against the flex region and disengage the seal from the pressure - release vent , allowing the gas to exit through the pressure - release vent .