This 3D printed cup holder is designed to let you magnetize your drink to everyday metal surfaces. It’s especially handy for tailgating, hanging out in parking lots, working outdoors, or setting your drink on the side of a car while gearing up at the ski resort. The built-in magnet pockets make it easy to attach the cup holder securely to any steel surface so your drink stays upright and within reach. The holder uses 40 x 10 x 5 mm magnets. They slide into the side slots and can be secured with a small amount of adhesive. After installing the magnets, glue the top cover in place to lock everything together. Designed for magnet size: 40 x 10 x 5 mm Example magnets: https://a.co/d/cxFOqWy Note: The color shown in photos may differ from the final product. The printed version is currently Black. The part is made from PETG for added strength and durability in outdoor environments.