ALPS Mountaineering Arvada Pack
Here's what other sites are saying:
The Arvada Hydration Pack lets you comfortably carry 3 liters of water and still have plenty of room for extra gear while cycling, skiing, hiking and doing countless other activities.
When you need to carry plenty of fluids with you, take along the ALPS Mountaineering Arvada pack. Not only does it include a 3 liter bladder, pocket and port, and insulated tube, it also has ample space for other gear that you want to bring along. There are neoprene pockets on the front to keep small items handy, as well as a neoprene bottle pocket on each side of the pack. Weighing in under 2 pounds, you can easily bring it with you wherever your adventures take you: cycling, skiing, hiking... the possibilities are endless!