Master Magnetics Magnetic Cup Caddy Holder - Black - Keep Your Favorite Beverage at Hand Magnetic Cup Caddy allows you to keep your favorite beverage at hand, whether in the garage, workshop, office, outdoors and more! Powerful magnet attracts to any ferrous metal surface including toolboxes, filing cabinets, grills, or even heavy machinery and equipment! Extremely versatile! The Caddy holds travel mugs, aluminum cans, water bottles, pray cans, pens, pencils, small tools and more! Made of durable plastic with a protective rubber liner to prevent surface scratches. Measures: 4.75l x 3.5. Holds containers up to 3.25 dia. at base.