The Nalgene Narrow Mouth water bottle is a classic outdoor adventure accessory. This BPA-free and leak-proof bottle is lightweight yet sturdy, making it the ideal hydrating companion. The narrow mouth design allows for on-the-go sipping, and its transparent design lets you easily keep track of your water intake. With its impressive durability, you can't go wrong with bringing a Nalgene along when you're in the High Desert rambling on.