Kangaroo 1L Collapsible Canteen with Pouch - Product Reviews
When I feel the need to carry more water, I take the 1L reservoir out of the pouch and store it in the top lid compartment of the pack. And into the pouch goes a one litre canteen.
Very useful and versatile system. Would recommend!
This is an A+. I will buy an bigger canteen within this week.