Replacement lid seals designed to fit the 20 and 30 ounce Stanley Flowstate Quencher H2.0 Tumblers. They are made of high-quality silicone and are BPA-free, making them safe for use. The seals are easy to install and provide a tight seal to keep your beverages fresh and leak-free. The package includes three seals, enough for two tumblers. These seals are a great alternative to expensive replacement lids and are a must-have for anyone who owns a Stanley Flowstate Quencher H2.0 Tumbler.