Our quick-ship Light-up Tumbler with Prom Design is very different than your average tumbler or water bottle. Featuring that popular tapered design, this 16 oz. acrylic tumbler comes with double-wall insulation to eliminate sweating and features red, blue, and green LEDs that are activated by an on/off switch in the base that you can set to "constantly on" or "blinking." Students will love the "light show" they get with this Prom gift! In addition to the fancy lights, the Tumbler also comes with a clear lid and straw and our stock "Prom" design on one side in white as shown. The fun and functional tumbler is an especially perfect Prom favor for a 1980s theme or glow theme, and because it includes our "Prom" imprint, the tumbler ships the same day you order when your order is placed by 2:00 pm, EST. NOTE: Replaceable batteries are included.