HandleStash Classic handlebar mount drink holder. Patent-pending shock absorbing design adjusts to the size of the drink and resists the elastic spring motion to smooth out those bumps. The built in elastic compresses the HandleStash so it is short when nothing is in it, and gets deeper the heavier a drink is. A 12 oz can rides high so it's still reachable and a heavy insulated water bottle sits much deeper and uses the full stretch so it's securely held in place. Classic model with stiff elastic is best for heavier drinks like crowlers and 750ml bottles. Fits drinks from 1" to 3.25" inches diameter.