Make your elementary school's nighttime events, glow-themed parties, and carnivals extra-exciting with Glow-in-the-Dark Cups with Lid and Straw. Your students will love the color and parents will appreciate the lid to cut down on potential spills! The 12 oz. plastic cup comes with a frosted lid and 9" straw (choose your cup color and straw color). The glow effect is activated by exposure to light; keep the lights on until every cup has been handed out, them turn off the lights to enjoy the glow! Add a one-color imprint to one side to customize your cups for your elementary school fundraisers, student awards, Teacher Appreciation Week, school store, and more! The Cup measures 4 3/16" high x 3 3/16" diameter, and is BPA free and top shelf dishwasher safe.