It's the simple things that are usually the most ingenious. Why carry a canteen, rubbery tasting bladder, or a leaky squirt bottle, when all are bulky, and hard to keep clean? Bring a fresh bottle each time and enjoy the cleaner taste, then simply recycle it. Snap Ghost Ring's metal clip onto the neck of a common plastic drink bottle, clip it to a belt loop, or bag strap, and you've got an instant canteen. Un-clip the side-push buckle - The clip side stays on the bottle while you drink (swivel-hook side stays hooked on you.) Perfect to clip on a climbing harness, or day pack, it is superior to similar products using a rubber ring to hold the bottle as this ring typically breaks within a few days becoming useless. Our steel snap is indestructible.