In this instructable, you will make your own camelpak that you can carry around with you on your back. The biggest problem with carrying water bottles around, I've noticed, is that one: it's uncomfortable in a pocket, and two: that it takes forever to refill. This instructable uses a half gallon jug, so you don't run out as fast, plus you can exchange lids to another at any time.
PS. Sorry about the bad pictures. My camera is the worst thing ever to have 3 MegaPixels
Step 1: Parts Needed
There are four parts that go into the CamelPack. This is an apple juice bottle pictured here, but you could probably do it just as well with some smaller surgical tubing and a two-liter bottle. Also not depicted here is a clothespin. The wooden kind works well.