Product Overview: The YETI Rambler 20 Tumbler is sure to become your new favorite companion, perhaps for life, too! It comes constructed of 18/8 stainless steel, making it ultra-durable and rust-free without the metallic taste, and the double-wall vacuum insulated design is leading technology that keeps your coffee hot and your iced tea iced. It is BPA-free, and you can gauge the level of your beverage via the clear lid, which is also BPA-free. Its sweat-free design is even approved for use on grandma's coffee table, without a coaster! Features: Additional features: 20 oz. Five-year warranty