The Nalgene® Sustain is a classic hard-sided water bottle built from BPA-free, impact-resistant plastic with 50% Certified Recycled Content, making it a more sustainable choice for daily hydration. Available in both wide and narrow mouth configurations, it carries a Hyperlite Mountain Gear logo and handles everything from backcountry miles to commutes without complaint. Durable enough for years of use and simple enough to maintain, it remains one of the most reliable hydration tools in the outdoor canon.