We've brought the legendary insulating power of our Rambler Tumblers into bottle form. The 36 oz (1065 ml) YETI Rambler Bottle is the perfect addition to your blind, ranch, or boat, with enough power to keep your water cold until the very last drop. The 36 oz. water bottle features a durable 18/8 stainless steel construction with a No Sweat? Design to keep condensation from collecting. And it's BPA-free. In other words, this is the only insulated stainless steel bottle for cold (or hot) beverages that are built for the wild.