It looks like a light bulb, but it's hiding a fantastic secret: It's actually a light up cup - a "bright" idea for a student award, unique Prom favor, Homecoming keepsake, or school fundraiser. The 16 oz. opaque white plastic, light bulb shaped tumbler measures 7" high x 3 1/2" at the widest part of the base. It comes with a built-in LED that uses blue, red, and green lights and 8 different light modes, including single-color steady on and rotating. It comes with a screw-on metal top and 9" clear, flexible, and reusable plastic straw. Add your choice of one-color imprint to the front of the cup to customize it for your school or event. A fun science award for students, the light bulb tumbler also makes a fun Homecoming keepsake or unique Prom favor to match a tropical, neon, or 1980s Prom theme.