Rum and wine: inner diameter 3 cm (standard size). The grooved design in the wall keeps your wine tight. Slows down the oxidation process, prolongs and preserves the fresh aroma of the wine, and makes the wine smell natural and fresh. Food Grade Material: Made of 100% food grade silicone, latex and BPA free, won't bring any odor to your wine. Durable, shatterproof, reusable and never rust. Easy to clean and dishwasher safe. WIDE APPLICATION: Suitable for standard bottles of wine, beer, champagne and soda, including some larger models. With this wine tool, bottles can be easily placed on their side without worrying about leaks. Just leave any leftover wine in the bottle. DIY Design: Silicone wine stoppers are easy, with these markers, you can creatively label your wine bottles. So you never have to worry about finding the wrong bottle. You can create your favorite DIY designs or brand the bottle caps. BEST WINE GIFT: The wine stopper set is definitely a gift you can give to a wine lover or wine cellar. Vacuum that holds wine, standard size wine corks for general purpose wine bottles for use at home, travel or outdoors.