This Short Light-up Cup may be small in stature, but it packs a big punch of flash your students will "glow" crazy for. The 12 oz. opaque acrylic tumbler comes with a lid and straw for added security and lights up with red, green, and blue LEDs that shine steady or change color and cycle through 8 light functions for hours of fun. Add your choice of one-color imprint to the front of the cup to customize it to match your school colors or event theme. It's the perfect custom keepsake for a Glow Prom theme, After-Prom party, or graduation event. Three replaceable AG13 batteries are included, so the cup will be ready to use right away.