【Leak Proof & Spill Proof】 Engineered to prevent leaks and spills, good sealing performance allow you to carry, do sports, and drink with complete peace of mind, without worrying about liquid splashing. 【Only Fit for Stanley 40 oz Tumbler】Specifically crafted for the Stanley 40 oz Quencher tumbler. For 30oz tumbler or other brands of tumblers, due to size issues, the lid and your tumbler may not fit properly. 【High Quality Material】Made of BPA-free plastic, food-grade and odorless, highly transparent, reusable 【Convenient Flip Straw Lids】 Collapsible straw design, easy to drink, hygienic and convenient, prevent dust from entering the cup, enjoy delicious drinks with peace of mind Upgrade your tumbler experience with SBMKK 40 oz Tumbler Flip Straw Lid. 1. SBMKK tumbler flip straw lid is specifically designed for 40 oz tumblers, compatible with Stanley, including Adventure, Travel, Quencher H2.0 FlowState tumblers. This tumbler flip straw lid is only compatible with Stanley tumbler. mugs. 2. The replacement flip lid ensures a perfect fit for your 40 oz Tumbler, and it is designed to be leak-proof, preventing any liquid leaks during use or storage. Made from high-quality plastic, these lids are food-grade, odor-free, and reusable for everyday use.