The AutoTank XL is just like our CompTank a classic, but with an upgrade that makes this bottle even better! 750 ml of refreshment is available in this still compact bottle. The AutoClose valve is super easy to use and gives a big opening while drinking so you can drink fast and as much as you want. The bottle is easy to wash and can even be placed in the dishwasher. No spills, yet always access to your precious water.