This cup holder snaps onto the 1" diameter tubing on your rollator or walker without the need for tools during the installation process. The cup holder's 2 hooks grip the tubing on your mobility device, providing a tight grip without the hardware of some other cup holders. This smaller cup holder has been designed to fit 12 ounce cans, plastic soft drink bottles, and water bottles – click here if you're looking for a larger tool-free cup holder. For added convenience, this cup holder rotates out of the way to allow you to travel through narrow doors and corridors – all without having to remove your drink! Also, this product does not interfere with the folding of your walker/rollator, so once it’s attached you don't have to remove it to put it into storage. This product is made of very durable, high density polyethylene material that lasts!