Stopper with hermetic silicone interior suitable for Prosecco, Sparkling Wine, Champagne and Cava. The natural adhesion of the silicone creates a hermetic seal on the neck of the bottle that prevents carbon dioxide outflow, keeping the sparkling wine for longer. Easy opening and closing system, just press and turn. The system of closing with balls guarantees the hermetism of the piece and avoids that this leaves dismissed by causes of pressure. The stopper allows to keep the bottle in any position.