The YETI Rambler® 18 oz Tumbler Bottle is a next-level addition to your rough commutes, day hikes, or kayak trips. That's because this tough bottle is double-wall vacuum insulated to keep your water cold (or coffee hot) until the last sip, and its 18/8 stainless steel construction can stand up to even the toughest of conditions. Like the rest of our Rambler series, the 18 oz Bottle features a No Sweat™ Design to keep your hands dry, and you'll find the leak-proof, 3-finger grip, insulated TripleHaul™ Cap protects your truck cab or day pack from spills.