Whether biking or hiking, we never leave without a hydration bladder in our pack. The Osprey Hydraulics 3L Reservoir is a premium choice for hydrating on the go, thanks to its easy-to-use system and ergonomic features. The Hydraulics 3L Reservoir has a Slide-Seal top for easy, efficient filling and secure closure. The QuickConnect System allows us to easily disconnect the tube and install a water filter when in the backcountry, and the Hydrapak Blaster bite valve has a fast water flow and an on/off switch. The Hydrostatic Backerplate gives the reservoir structure when filled to make installing it in a pack easier, and a magnetic clip on the hose that pairs with a magnetic clip on the shoulder strap keeps our hose and bite valve in place.