When you’ve got a big thirst, only a big hydration pack will quench it – like the MEC Mountain Fountain Big Hydration Pack. Outfitted with a 3L Source Widepac water reservoir, the Mountain Fountain ensures your tank never dips to empty, thanks to its wide-opening, high-flow tube, and drip-free bite valve. Carrying this MEC hydration pack is comfortable – its polyethylene and aluminum internal frame is paired with a waistbelt, sternum strap and padded, contoured shoulder straps let you carry it around all day without strain. It even comes with plenty of storage space, as well as external velcro pump holder and stretch mesh pockets. The Mountain Fountain retails for $51. MEC.