Origin-8's Hydration Pack has what you need for no-hassle, no-hands hydration. With 84.5 ounces (2.5 liters) of liquid capacity, it holds the equivalent of three water bottles. You can also store your keys, driver's license and an energy bar in the secure outer pocket. The reservoir is easy to fill and clean, and the breathable mesh harness allows heat to escape so you stay cool.
Liquid capacity: 84.5 ounces