It can be used to securely attach water, soda or other bottles to your bike, tractor, motorcycle, golf bag, belt, belt loop, back pack, stroller or any other place you can imagine. It securely holds the bottle under the spout so you can drink without removing the bottle from the rubber attachment. You can also add Keys, ID's, Badges, Reels and many other things to the split ring. Please see our other Key-ID-Badge-Reel accessories under COLLECTORS DICE listings.
The product worked and did exactly what they advertise. The problem is that the plastic ring that fits around the neck of the bottle has such a strong plastic odor / stink that I could not tolerate leveling the ring on the bottle while drinking. Wouldn't buy another one.