Repressurizer for carbonated drink containers

In combination with a bottle having an externally threaded opening, a hand operated pump including a cylinder, a piston therein, and a handle externally of said piston extending laterally away from said bottle, a one way operating valve at one end of said cylinder, said cylinder having an integral extension which is internally threaded to engage said threaded opening of the bottle, a port connecting said internally threaded extension and valve, whereby air may be compressed in said bottle without adding appreciable height to the assembly.