derguam 4 packs 100% leakproof champagne stoppers champagne cork champagne saver champagne bottle stoppers to keep champagne fresh perfect for champagne, cava, prosecco & sparkling wine, black bericham <b>features:</b><br>- 100% safe for your health: made of high quality silicone. has sleek finish and no odor.<br>- leak-proof air right seal: silicone seal locks in bubbles to preserve champagne’s freshness longer and keep it from going flat too quickly.<br>- easy to use & compact: insert and clip to the bottle neck. after use, washing after running water. it is compact for easy storage.<br><br><b>specification:</b><br>- size: 1.57*1.57*1.18 inch<br>- material: food grade silicone and plastic (bpa and pthalate free)<br>- color: black<br><br><b>how to use:</b><br>- 1. rotate the upper part anti-clockwise to unlock before used.<br>- 2. insert firmly into the bottleneck, rotate the upper part clockwise until a click sound to lock the seal.<br>- 3. to open again, unlock the stopper before removing it.<br><br><b>package includes:</b><br>- 4 × champagne stoppers