Perfect Fit: These 40 oz tumbler lids are compatible with Stanley Quencher Adventure Travel Tumbler 40 oz and other brand 40 oz tumblers. 100% Splash Resistant and Spill Proof: Without removing the lids, these clear 40 oz tumbler lids allow you to see how much drink remains. They provide 100% splash resistance and heat insulation, help prevent spills when the tumbler is tipped over, and help keep your drink insulated. Safe and Reliable: These 40 oz tumbler lid replacements are made from environmentally friendly, non-toxic, food-grade material and are BPA-free. They are dishwasher safe, lightweight, safe for direct contact with beverages, and easy to clean. Practical and Convenient: Designed with a sliding closure, these lids are easy to open and close. They can be used with tumblers for water, juice, tea, coffee, milk, and other beverages. Ideal for use during travel, driving, camping, sports, or work.