✅High-Quality Silicone Material: This silicone spill proof stopper set is made from 100% food grade silicone and is environmentally friendly, healthy and reliable. Made from high quality materials, it is highly reliable and resistant to wear and tear, ensuring long-lasting use. ✅Only for Version 1.0: Not available for H2.0. Only compatible with stanley tumbler 1.0 40oz & 30oz. ✅Straw Topper: The straw tip cover cap prevents water from spilling out of the straw, and can stop debris and dust from entering through the straw. ✅Easy to Use: The Stopper Set is very easy to use, simply insert the stopper into the mouth of the cup without too many steps. He spill stoppers set of 3 is food grade silicone, reusable, BPA free, dishwasher safe. ✅Round Leak Proof Plug: Installed in the middle of the inside of the lid for sealing, with a cross opening design to ensure that air enters when drinking water, making drinking water easy.