【Essential Spill Proof Accessories】Great bundle for solving the leaking tumbler. Including 2 straw caps, 2 square spill stoppers, and 2 round lid leak stoppers, compatible with Stanley tumbler H2.0 40oz & 30oz only. 【Improve Leak-resistance Performance】Say goodbye to water leakage from your tumbler with our leak stopper kit. The leak stopper set is designed to significantly reduce spills, providing an improved leak-resistant solution for Stanley cups. 【Food Grade Silicone】The spill stoppers set is made from premium food-grade silicone, without any unpleasant smell, providing a premium and safe drinking experience. Reusable, BPA-free, and dishwasher safe. 【Useful Gadget】The spill-proof set can prevent the straw from being contaminated by dust and saliva in the air, and also prevents crumbs from entering the water cup, keeps the straw and cup hygienic, and let you drink with confidence anytime! 【Satisfied Service Guarantee】If there is any problem with our product, please contact us as soon as possible. We will do our best to satisfy you.