SET 3 PACKS: This tumbler lid is specially design for Yeti Rambler, Old Style RTIC, Ozark Trail and most other 30 oz tumblers or cups, prevents any spill of drinks. SPILL-PROOF: With this lid, there is no more worry about the spill of water or drinks. It helps to prevent spill while turning over the tumbler and keep your drink insulated. BPA FREE MATERIAL: Made of AS crystal clear plastic which is BPA free, the lid can be in touch with the drinks directly. LOCKING TIGHT: Featuring a new locking mechanism, the clasp is locking tight, liquid will never leak from the hole. 3 DIFFERENT COLORS: There are 3 different colors: gray, red and blue.