The Nalgene Sustain 48 oz. Tritan Wide Mouth Water Bottle is BPA free and has printed graduations to help you keep track of your hydration. Fits in the side pocket of most hiking backpacks so you no longer have to worry about running out of water. Made of Eastman Tritan copolyester and is BPA free. Dishwasher safe on the top rack - Just keep the lid away from the heating element. Printed graduations help you track your hydration. Holds 1.5 Liters or 48 ounces. Made in the USA.