KneeRover® Universal Cup Holder: The Most Versatile Cup Holder for Knee Scooters and Walkers The KneeRover® Universal Cup Holder is designed to easily attach to knee walkers, knee scooters, wheelchairs, rolling walkers and rollators with tubing diameter from 5/8 to 1.5 inches. Take your favorite beverage with you! If you are recovering from a broken foot, broken ankle, broken leg, foot surgery, ankle surgery or other lower leg injuries or medical conditions like ulcers, the KneeRover® Cup Holder...