Compatible Walking Aids: The Wonder Cup Holder is specifically designed for use with Stander's Wonder Walkers and Wonder Rollators; the accessory securely attaches to your mobility device, offering a dependable storage for drinks and beverages Easy Drink Access: The 4-inch diameter cup holder fits most bottles, mugs, tumblers, and cups; the flexible flaps inside the cupholder help to secure cups in place to prevent spills while on the go Simple Installation: Quickly attach the cup holder to your Wonder Walker or Wonder Rollator; no tools needed; to attach, simply remove one of the walker handles, slide the attachment bracket onto the handle, and reinsert the handle into the walker Regain Independence: Ideal for elderly adults with limited mobility, individuals with disabilities, handicaps, or chronic conditions, the Wonder Rollator offers reliable balance and support to walk with confidence