The magnetic ZipSip features a built-in magnet that sticks to metal surfaces like grills, golf carts, and patio furniture. With this cool, hands-free option, you can keep your drink easily accessible without risking someone tripping over it when you set it down to participate in activities at tailgates, BBQs, and outdoor events. Note: Use care when considering where you store your magnetic ZipSip. The magnet can interfere with the internal magnetic fields of credit cards, some medical devices, and electronics.