The Yeti Coolers Rambler 36oz Bottle takes insulation to the next level, complete with a double-wall vacuum to keep drinks hot or cold for hours. Perfect for remote campsites and rough work sites alike. Just like the other Rambler Bottles, you'll find the 64 oz outfitted with a Triple Haul cap, making it easy to grab on-the-go and even easier to open up when you're ready to wet your whistle. The 36oz Rambler Bottle also features a No Sweat design to keep condensation from collecting and its 18/8stainless steel construction can withstand a serious beating. Unlike narrow-mouthed drink bottles that are a hassle to fill or rinse, the Rambler Bottle features Over-the-Nose technology for easy loading, drinking, and cleaning. And it's BPA-free. In other words, the Rambler Bottle is the only insulated container for cold (or hot) beverages that's built for the wild.