Device to retain carbonation

摘要

A device that allows a user to retain carbonation in conventional plastic beverage bottles for extended periods of time. In a first embodiment, a fluid impermeable, inflatable, elastic bladder is employed to fill the vapor space in the bottle when the beverage is dispensed. With the vapor space filled, the CO₂ carbonization gases cannot dissipate. The bladder is removably attached to a nozzle cap. The nozzle cap incorporates an arrangement including an inflating tube that permits a user to inflate the bladder by simply blowing into the inflation tube.