The Hydraform Soft-Tech Handheld from Amphipod holds 10 oz of hydration and the sleeve is insulated to keep fluids cool 30% longer.  The high-flow bite valve auto-seals after each sip and the bottle shrinks as you drink!  This handheld has so many hidden storage areas.  The big one is an expandable, easy-access zip pocket that measures 5.5″ x 3.5″ x 1.5″.  There are three quick access slots on the outside of the hand strap to hold gels for fast nutrition.  You need to carry your car key and money? No problem when you can stash the key fob inside main zippered pocket, additional divided area for cards, ID and cash.