A. Perfect Fit: These 40 oz tumbler lids are compatible with Stanley Quencher Adventure Travel tumbler 40 oz and other brand 40 oz tumblers, such as Stanley 40 oz Tumbler with Handle. B. Splash Resistant and Spill Proof: Without taking off the lids, these clear 40 oz tumbler lids can help you know how much drink you have left. Moreover, they are splash - resistant and heat - insulating, preventing spills when the tumbler is turned over and keeping your drink insulated. C. Safe and Reliable: The 40 oz tumbler lids replacement are made of environmentally friendly and non - toxic food - grade material, BPA - free, dishwasher - safe, and lightweight. They can be in direct contact with the drink and are easy to clean. D. Practical and Convenient: The Stanley lids are designed with a slider that is easy to slide. They can be used with tumblers for water, juice, tea, wine, coffee, milk or other drinks. You can use them to cover your tumblers when travelling, driving, camping, doing sports, working, etc.