【Precision-Fit Design】Our leak-stopper set is expertly designed to ensure perfect compatibility with 40 oz and 30 oz Stanley 2.0 tumblers. 【Complete Leak Prevention Kit】This set comes with 2 straw covers, 2 straw stabilizers, and 2 round lid seals. Each element is crafted to target distinct leakage areas, ensuring your tumbler stays leak-proof under all circumstances. 【Premium Food-Grade Silicone】Our leak-stopper set is crafted from top-tier, food-safe silicone, ensuring the longevity and safety of your drinks. This eco-friendly option is reusable, effortless to clean, and resistant to extreme temperatures. 【Simple Setup】Every component of the set is crafted for hassle-free installation and a snug fit. Swiftly prepare your tumbler for a seamless experience, whether you're indulging in hot coffee or a chilled drink. 【Versatile Design】Not only is it leak-proof, but the straw fix stopper also holds the straw firmly, ensuring a stable drinking experience without the straw shifting. The round lid seal guarantees a snug fit, enhancing the sipping convenience and preserving the leak-free performance. NiHome Food-Grade Silicone Spill Proof Stopper 6-Pack, Easy Installation Precision-Fit for Stanley 2.0 Tumblers 40 oz/30 oz, Complete Kit with Straw Covers, Stabilizers & Lid Seals