100% biodegradable water bottle, as used by many pro teams. Entire bottle, including the cap is compo stable and will return to the elements thanks to the corn-based plastic (rather than oil-based). New triple-function cap with soft rubber push-pull nozzle is easy on the mouth and delivers fluid fast. Easy to grip bottle with ergonomic shape. Dishwasher safe and BPA-free. 550 ml liquid capacity.