recently, nalgene has added hydration systems to its cycling and wilderness product line. the line features 1- to 3-litre bladders with hose-and-bite-valve assemblies in small back-carried packs (mostly under 1000 cubic inches (16 l) of additional storage). nalgene offers the option of two different bladder materials for a choice of superior taste and bacteria resistance versus improved durability. in addition, the bladder on these products can be quickly detached from the hose and pack by a self-sealing connector on the bladder. these features were intended to improve on perceived issues with existing hydration systems, including difficulty filling and/or leaking water into gear that shares the pack.