The muc off water bottle features a soft rubber push pull nozzle for a high flow and fast delivery of fluids so hydration on the go is always easy not only is our bottle lightweight and easy to squeeze its also meets uci regulations for professional races this is thanks to its corsa blow off top that means a dropped bottle wont take out a cyclist behind you muc off water bottle has a 550ml capacity and is also 100 biodegradable dishwasher safe and bpa free so why not choose the bottle