COMPATIBILITY: This tumbler lids are specially design for Yeti Rambler, Old Style RTIC, Ozark Trail and most other 20 oz. tumblers or cups, prevents any spill of drinks. BPA FREE MATERIAL: The lids are 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. SAFE MATERIAL: The straws are made of food Grade 18/8 stainless steel, non-toxic, BPA and lead free, no metal aftertaste. They will not rust, crack or be scratched. EASY TO CLEAN: Come with 2 special scrub brush. Featuring a stainless steel handle and nylon bristles, the brush is of the perfect size for these straws, also suitable for cleaning cups and bottles.