Compatible with Stanley Classic Legendary Vacuum Insulated Wide Mouth Bottle. The stopper is designed to be used with a variety of beverages, including water, coffee, tea, and mate. We are committed to a better life. Thermos Replacement Stopper Most of the thermos bottle will leak after a long time of use, with poor sealing and heat insulation. The main reason is the aging and damage of the bottle stopper. A new replacement will be the best solution. High Quality Our threaded replacement Stopper is designed to be a high-quality replacement for your Stanley Classic thermos models. It is made from food-grade, BPA-free material, each bottle stopper has been tested for sealing before being marketed and designed to meet the highest quality standards. Wide Pour Our thermos stopper easy to use, making it easy for a wide rapid pour, simply unscrew top spout and pour. Anti-Leak The stopper features a high-quality silicone gel ring that prevents leaks and ensures that your liquid remains at a stable temperature. This means that you can use your thermos with confidence, without worrying about leaks or spills.