[Reliable Material] Made of high-quality plastic, tasteless, the thermos stopper is not only resistant to high temperatures, but also acid and alkali resistant, can withstand daily use of hot water and other liquids, not easy to deform, age or produce harmful substances, it will not threaten human health, safe and reliable[Wide Compatibility] Compatible with Stanley Classic model insulated bottles, it is also compatible with Stanley Classic wide mouth vacuum insulated bottles (1.1 QT, 2 QT) for use with water, feeding drinks, coffee, tea and more[Leak-proof Design] The thermos stopper comes with a silicone sealing ring, which can fit tightly with the bottle opening to form a good sealing effect. And tight spiral inner sealing lid design, this design further enhances the sealing, but also can make the stopper and bottle opening more stable, in the use process it is not easy to loosen or fall off[Easy to Clean] The thermos stopper is easy to maintain and clean, can be used over and over again. The thermos vacuum bottle stopper is small and cute, smooth and seamless, can be easily cleaned with water, dishwasher is not recommended, and please do not use it in the microwave[Practical and Portable] This thermos stopper is a practical replacement accessory. The screw stopper allows you to pour your drink without completely removing the stopper, and the good sealing ensures no leakage. You can use it at the campsite, workplace, in the RV or anywhereColor: As shownMaterial: plasticPackage Contents:2 x bottle stopper