Here's what other sites are saying:
All the benefits of the classic Hydraform Handheld with secure, bounce-free low profile storage! The Amphipod Hydraform Handheld Pocket's ergonomic design allows hand to relax. Breathable AirFlow mesh and ultra soft inner. Easily adjusts to fit any hand size. All Amphipod bottles are recycling symbol #4 LDPE and are BPA-free.
The Amphipod Hydraform Handheld Lite Pocket keeps liquids and a few essentials right at your fingertips. Low-profile, bounce-free zippered pouch provides easy access to essentials and energy snacks; measures 6 x 2 x 1in. Pocket includes a low-profile, 12 oz. Hydraform bottle ergonomically designed to to let the hand relax in a natural position. AirFlow hybrid mesh technology cushions your hand, wicks away moisture and circulates air between your hand and the carrier. Quick adjust strap easily adjusts to fit any hand size. Polyethylene bottle is 100% BPA free.
Guyot Designs SplashGuard
Platypus Bite Valve Cover
Nalgene Insulated Water Bottle Sleeve
CamelBak Fresh Reservoir Filter
$18 - $19
MSR SweetWater Prefilter
$1 - $9
Osprey Hydraulics Cleaning Kit
$9 - $24
Ultimate Direction Kicker Cap