Durable & Safety - Internal use of Stainless-steel, non-corrosive and durable, external made of food-grade silicone (Same material as baby nipple), Dual functions design allows the stoppers to fit snugly and securely inside virtually any bottle to provide a perfect seal. Easy to Use & Clean - Our wine stopper is ergonomic with a cone shaped design are easily inserted and removed and without hassle. also easy to store when not in use. (P.S you can put these in the dishwasher for easy cleaning!) One Size Fits All Your Bottles - Our stoppers are designed to fits virtually any size wine and other bottles (even olive oil and vinegar bottles) with an air-tight seal to prolong and preserve your opened bottles or beverages. Colorful Stoppers - Come with four colors (Red, Blue, Dark Blue and Purple), Our eye-catching colors can be used to match your event's theme and add cheer and brightness to your bottles whether it’s for everyday use or a special occasions. This product makes a great gift for any wine lover, you can give them as a gift, or keep them around the house for your next party.