COMPATIBILITY: This tumbler lids are specially design for Yeti Rambler, Old style RTIC (with RTIC text logo on the cup), Ozark Trail and most other 30 oz. tumblers or cups, prevents any spill of drinks.Not for NEW STYLE RTIC tumbler. ALL PURPOSE: Tumbler lids for Spill-proof Splash Resistant, extra cleaning brush and straw Great for Use with Smoothies, Coffee, Tea, Festive Cocktails, Children’s Bottles. Also Great for Use in Car Thermos or Water Bottle. 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. 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. LOCKING TIGHT: Featuring a new locking mechanism, the clasp is locking tight, liquid will never leak from the hole. 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.