Our LED White Glow Cup is the perfect favor for a glow or 1980s Prom theme. Add them to your swag bags, or set one at every place setting. Activate the glow by removing the pull tab and pressing the button on the bottom. Choose 1 of 3 light functions: flash, blink, or steady light. Includes three replaceable AG13 batteries. Customize your LED White Glow Cup by adding a one-color imprint on one side as shown.