This is a drink holder made specifically for walkers, rollators, wheelchairs, crutches, and electric scooter handlebars. This drink holder comes in 2 different sizes, small and large. The smaller size fits smaller containers such as 12 ounce cans and 20 ounce plastic bottles. The larger size fits bigger containers such as mugs and larger water bottles. You must choose which size you want
. The top ring of this cup holder, for both the small and large sizes, can be reversed to allow for either left or right hand applications – it's your choice! This drink holder uses the SnapIt! mounting system that enables it to attach to a wheelchair, walker, rollator, crutches, and even an electric scooter&apsos;s handlebars! The larger cup holder has an inner diameter of 3.62" and an overall height of 3.95," while the smaller cup holder has inner diameter of 2.9" and an overall height of 3.95". Both sizes of this product have been made using high density polyethylene, an incredibly durable plastic that will not break! If somehow it does manage to break, utilize the lifetime warranty to get the drink holder repaired or replaced at no additional charge (just pay shipping).