【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. 【Perfect Fit Design】Specifically crafted for the Stanley 40 oz Quencher tumbler, our replacement lid offers a seamless fit with the handled 40 oz tumbler. Enjoy a secure and stable drinking experience every time 【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 L-Proof Confidence】: Our replacement flip lid is designed to prevent liquid leaks. Once securely fastened, it ensures leak-proof performance, providing you with peace of mind during both use and storage of the tumbler. Never worry about liquid splashes again.