Light up your drinks for Halloween, Day of the Dead and Pirate theme events. Your witch's brew will be much more exciting when served in our Light Up Neon Green Skull Cup. Our 16 oz green plastic cup features double walls and a blue LED built into the screw on lid. Each Neon Green LED Skull Cup comes with a plastic straw and 3 AG13 batteries included and installed. Reusable and hand washable.