100% Leak-proof - our Stanley 40oz tumbler lid is the perfect accessory for Stanley 40oz cups, so you don't have to worry about spilling drinks when you're carrying them out or working,and it is very convenient to carry. Compatible Cup Lids - Our new 40 oz tumbler lid is specifically designed to perfectly fit Stanley's 40 oz Adventure Quencher Travel and Quencher H2.0 tumblers、Stanley ProTour,effectively eliminating leakage issues and keeping your beverage safe,NOT fit for Stanley ice flow. Made with Food-Grade premium quality materials BPA Free - This Stanley 40 oz leak-proof flip cup lid is made entirely from food-grade materials and high-quality BPA Free PCTG materials, making it reusable and extremely durable. Foldable and detachable Lid Design - The detachable design of our 40 oz tumbler lid allows for easy disassembly, ensuring hygienic use. The foldable straw let your drinks spill proof. Includes Product and Color Matching - 2x Leak Proof Lids 2x Straws, 1 auxiliary disassembly tool,there have 10 Colors You can choose any color you want. Includes Product and Color Matching - 2x Leak Proof Lids 2x Straws, 1 auxiliary disassembly tool,there have 10 Colors You can choose any color you want.