With the risk of hydration reservoirs losing water through the valve there's no doubt that water bottles are the simplest way to carry water--until you actually go to take a drink. However Osprey's Quick Connect Kit reduces the risk of your hydration bladder losing water thanks to a mid-hose cut-off valve so you can sip easy while you're on the move without having to worry about turning around to a soggy mess of backpack. This system even allows you to detach the reservoir from the hose for easy refilling at the kitchen sink or spring.