Stainless steel material: Made of food-grade stainless steel silicone, high hardness, corrosion resistance, strength, and durability. The size is suitable for most champagne and sparkling wine bottles. 100% sealed to prevent leakage and preserve the freshness of the wine for up to 10 days. It is a safe and non-toxic high-quality wine bottle accessory. EASY TO USE: Place the champagne bottle stopper on the bottle and press both wings down. Easy to lock and unlock. The size fits perfectly to the bottle neck, the airtightness is good, and no carbon dioxide will overflow. They are easy to clean, reusable, and easy to store. WIDELY USED: Our bottle stopper is suitable for most wine and champagne bottles. Even if the wine bottle is placed flat in the refrigerator, don't worry about the bottle leaking out. Keep your wine fresher longer.