Bite valve for water bottle is made of silicone material, very safe, softer and flexible, and wear resistant, practical design, can serve for a longer time. There are enough quantity to meet your daily life using and replacing needs, and also nice friends, and others. Features -Color:White -Material:Silicone -Size:3.80X2.80X2.80cm/1.49X1.10X1.10in - Wide compatibility, water bottle mouthpieces can replace bite valve of various of water bottles. - Water bottle mouthpieces are convenient and practical, replace them to make your water bottle look new. - Made of safe silicone material, bite valve replacements are safe and practical to use, can be applied for a longer time - Bite valves are easy to install, simple installation steps make it easy for you to complete the replacement. - These bite valve replacement are good replacements, keep your bottle at a clean and condition. Package list: 2 bottle mouthpieces