Drink for your health. Hydration is an important part of a healthy lifestyle, which is why Nathan Performance Gear has a full line of BPA-free bottles. Perfect for the office, the gym, the car - wherever - Nathan's bottles make it easy to stay healthy and hydrated all day long, and cut down on the some 38 billion disposable bottles that end up in landfills. Nathan's Stainless Steel Bottles: - Made with 18/8 (food grade) stainless steel, - Chemically inactive material that doesn't pore or crack - no bottle liner needed, - 100 percent recyclable, - 100 percent BPA-free, - Long-lasting and durable, - Available in 500 and 700 mL,