Champagne looses effervescence once the pressure cork is released. Use this fantastic patented Champagne Stopper to pump air back into an opened bottle so you can store it in the fridge and keep it bubbly! It even has a dial to show the date you stored it. stopper: 3.5 x 7.8cm high. Made from ABS, Stainless Steel and Silica Gel - food safe.