The super-soft squeeze and ergonomic-shaped Nathan SpeedDraw 18 oz flask offers a high flow rate and an easy-open silicone cap that's easy on the teeth, all making for easy drinking on-the-run. This bottle is made from BPA-free Tru-Flex and is dishwasher safe; fits Nathan race vests, Peak Pak, Horizon Pak and SpeedDraw handhelds.