Glow Light and Handle makes it easier to hold and carry your 30 oz. tumbler as it lights your way around in the dark. Gives you the power of light wherever you take it. No more slipping, dripping or tripping while trying to hold and balance your tumbler when your hands are full. Perfectly holds your tumbler safe and secure with its rubberized non-slip grip ring. Glow Light and Handle fits most standard vehicle cup holders. Use as a task light, lantern or both! With 3 light modes (220 lumen task light, 130 lumen lantern and both lights combined). Full dimming and power memory setting. Requires 3 AAA batteries (included). Water and impact resistant.