Just push the Giro Champagne Stopper seal silicone into the bottle mouth and "twist the top clockwise" Uses an innovative locking system that is compatible with a wide range of bottles including champagne, caba, proseccol, and sparkling wine. Due to the slight shape of the bottle opening, you dont have to worry about "getting rid of the problem of the uncontrolled." It keeps the feeling fresh for a long time after unplugging and reduces loss in the By The Glass. It looks plain and is easy to work. Thats "Ziro".