[Reliable Material]Made of plastic, tasteless, the thermos stopper is not only high temperature resistance, but also acid and alkali resistance, withstand the daily use of hot water and other liquids, not easy to deformation, aging or production of harmful substances, it will not endanger human health, safe and reliable [Wide Compatibly]Compatible with for Stanley Classic model insulated bottles, it is also compatible with for Stanley Classic Vacuum Insulated Wide Mouth Bottles (1.1 QT, 2 QT) for use with water, mate beverages, coffee, tea and more [Leak-proof Design]The thermos stopper comes with a silicone sealing ring, which can fit closely with the bottle mouth to form a good sealing effect. And tight spiral inner sealing cap design, this design further enhances the sealing, but also can make the stopper and bottle mouth connection more stable, in the process of use 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 cap stopper is small and cute, smooth and seamless, can be easily cleaned with water, dishwasher safe 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-on stopper allows you to pour your drink without removing the stopper completely, and the good seal ensures no leakage. You can use it at the campsite, workplace, RV or anywhere Color: As Shown Material: plastic Package Contents: 2 x bottle plug