Don't let good wine go to waste with Trudeau's Expandable Wine Stopper. Super easy to use: simply insert and flip the lever to seal any bottle of wine. Trudeau's Expandable Wine Stopper prevents oxygen from the getting into the bottle by expanding in order to form a seal. A Trudeau Original Design, the Expandable Stopper is leaf proof so wine bottles can be stored horizontally in the fridge or cellar. Keep wine fresher and longer! Lifetime Warranty.