The Camelbak Crux™ Lumbar 3L Reservoir is thoughtfully designed to give your pack a lower center of gravity. It delivers more water per sip while keeping weight positioned low on your back, which means better stability on the trail. Features an on/off lever that seals your tube shut when youre not drinking, upgraded fill-port design to include an ergonomic handle, and redesigned a cap thats more intuitive and easier to fill. As always, Camelbak's Crux™ Lumbar 3L Reservoir is free of BPA, BPS and BPF.