Shop All YETI Keep drinks hot or cold with YETIs Rambler Tumbler with Magslider Lid. Anti-corrosive 18/8 food-grade stainless steel and double-wall vacuum-insulated construction. Condensation-free design is safe to put on any surface. Fits in YETI coolers cup holders and most other cup holders. Clear, dishwasher-safe Magslider lid. Lid and tumbler are both BPA-free. Available: 20 oz., 30 oz. Color: Black. Type: Travel Mugs.