Abstract: A closure with repressurizing apparatus for a carbonated beverage container used as an original factory closure cap or as a replacement to the factory closure. An internally threaded closure which is secured to seal the mouth of a container is combined with a pump cylinder and a hand operated air pump to repressurize the container. The pump cylinder is molded with one or more internal ridges that extend from the base of the pump cylinder to approximately three quarters the length of the pump cylinder. A valve is created when this ridge(s) interacts with the corresponding notch(es) formed on the base of the piston. The valve allows ambient air past the base of the piston only when it is above the ridge(s) on the pump cylinder.