To make it, you will need....
Aprox. 2 metres of duct tape
A water bottle
A small piece of Card
First, cut the card into a strip that goes 1/3 of the way up the water bottle, when it is wrapped in a circle around the base, and stick it on to the bottle. Then wrap duct tape around the rest of the bottle. To make straps, cut a piece of duct tape to the length that you need and fold it in half across te width of it. Then attach your strap with more duct tape.
Voila! A duct tape water bottle is now yours!