Abstract: A stopper for stoppering a bottle having a bottleneck and containing a beverage pressurized by carbon dioxide. The stopper includes a hollow body, preferably made of plastic, having a top opening which is able to be closed by a cover, the hollow body having a shank. A compressed elastic, for example, a spring, is being positioned in the hollow body. A charge carrier is arranged on an end of the compressed elastic and is directed toward the opening of the hollow body. The charge carrier is locked into position on the end of the elastic and is retained in a compressed state for as long as the shank of the hollow body is in the bottleneck of the bottle and is hindered by the bottleneck from giving way outwardly.