Nalgene N-Gen 1.0L Bottle (Platinum) A tough durable bottle with a burley carabiner friendly cap. Features Sort of between the wide mouth and narrow mouth the N-Gen has a 53mm opening. It makes it easy to fill and clean but also easy drinking. The N-Gen bottles are made in USA from BPA free co-polyester. Graduations to 24 ounces / 750 mL. About 9 1/2 inches high with a diamater of about 3 1/4 inches (Not going to fit in many cup holders). Weighs 173 grams. Closure is made from BPA free Polypropelyne with a TPE overmold.