YETI brought the legendary insulating power of their Rambler(TM) Tumblers into bottle form. The 36 oz. 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. Rambler Bottle features a durable 18/8 stainless steel construction with a No Sweat(TM) Design to keep condensation from collecting. And it's BPA-free.