The perfect drink ware to light up your party. These 12 ounce clear mugs are re-usable and a great party favor to send home with your guests. These cups have a special collar that fits in the bottom. Add our colorful glow stick that wraps around the bottom of the collar to light up your cup. You can use these over and over again so buy extra super bright shorties to use for future events.and with multiple different colors. These are sold in multiples of 15,with a pack of 15 super bright shorties.