Product Overview: YETI Rambler® 18oz Bottle The is a necessary addition to your day hikes, kayak trips, and daily commutes. This tough bottle is double-wall vacuum insulated to keep your water cold (or coffee hot) until the last sip and comes with a TripleHaul™ Cap. Separate your Rambler from the herd - Rambler Bottles are available in stainless and DuraCoat™ Colors that won't fade, peel, or crack. Features: 18/8 Stainless Steel: Made with kitchen-grade stainless steel, so they're puncture- and rust-resistant. Double-Wall Vaccum Insulation: Keeps cold drinks cold and hot drinks hot until the last sip. Dishwasher Safe: Because no one needs more work to do.