EliteShade Giant Alpecin 550 ml Water Bottle 2016 Blow-off feature greatly reduces the chance of a dropped bottle taking down a rider, making this the safest option for racing, sportive or group rides Entire bottle, including the cap is biodegradable and will return to the elements thanks to the corn - rather than oil - based plastic 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