If you didn't know better, you would think this Illusion Color-changing Fun Cup has some sort of magical power. It performs amazing feats of color shifting that may make you think your eyes are playing tricks on you, but rest assured, it is all real. The 17 oz. plastic cup features a special coating that actually changes color as it catches the light, creating a spectacular illusion effect. It makes a fun school or team fundraiser or giveaway for your school carnival, Movie Night, or other event. Add your school name or choice of one-color imprint to the front to customize the cup especially for your school or event.