No matter what kind of day it is, this Iridescent Rainbow Travel Mug is guaranteed to lift spirits and make the day brighter. A super fun Teacher Appreciation gift, staff award or school fundraiser, the 16 oz. clear acrylic tumbler includes an iridescent rainbow insert nestled between the two walls to give a fun pop of shiny color. The clear lid keeps contents secure, and the matching clear straw makes sipping easy. Add your school name, inspirational message, or other one-color imprint to one side to customize the travel tumbler for your school or event.