?? SPILL PROOF: With our pack of 4 Yeti tumbler lid, spilling is not an option. Created with a sliding mechanism, tighter clasp, so you don't need to stress over spills and leaks, particularly while filling hot beverages or driving. Our Pack of - 30 oz yeti rambler lid is compatible with tumblers from all known names - Yeti Cup, Ozark, old RTIC and others. EASY TO FIT: If you are apprehensive that this 3.7-inch diameter yeti lid will fit perfectly to your Pack of 4, 30 oz tumbler, then worry not. Measure the internal distance across and external breadth of the cup for the Yeti lid to cover your tumbler flawlessly and protect your drinks with insulated rings from any spillage.??? MAINTAINS TEMPERATURE: Enjoy your favorite beverage, hot or cold, with airtight Yeti 30oz tumbler lid that support your beverage's temperature due to its double sealing technology. Also, the Yeti cup lids prevents touching your nose, hence, is comfortable while using.?? SUPERIOR QUALITY: To be used for a long time, our Yeti top replacement lids made with top-notch materials and are BPA-making it non-poisonous, robust and sturdy.? EASY TO CLEAN: The yeti rambler lid is dishwasher-safe; the slider can be opened, & closed so that you can clean underneath it. It also has a contoured lip for direct tasting or drinking with a straw option. This also allows easy cleaning of the yeti lid after every use and is very hygienic than other cup lid.