My Mosko Moto Backcountry 35 panniers have rear pockets designed to take 2l Dromedary hydration bladders. The nozzle pokes out of a little hole in the bottom of the bag. 'Course that means getting off the bike to drink -I favour sipping constantly to stay hydrated rather than drinking a lot at less frequent intervals.

Attachment 16645

Not a great picture, but you can see the pouch and tube ok :-)

Thanks mate! I may actually copy your idea :)

I agree with Mollydog, it's a lot easier all around to just put a small CamelBack back-pack style water bag on your back than it is to put a water bag inside a tankbag or other on-bike location.

An even better alternative is to stop and take a break and drink a bottle of water at a roadside stop from time to time (assuming you are not riding in absolutely oppressive heat that demands you be able to drink water while you ride).

Michael