A screw cap for the closing to held of a mouth of a container action to contain a gasata or frizzante drink; it dictates mouth introducing, on the external face of a wall or collo of the delimiting container the same mouth, a controfilettatura apt to engage with the saying thread (5) stopper. This comprises : a first element to introducing screw (1) said thread (5) and action to bind the stopper to dictates mouth, and according to element of coaxial estate (2) regarding the first and action to penetrate in it dictates mouth and to join at least partially, to estate, the inner face of said wall or collo.