Dare to be square! This Custom Square Sippy Tumbler is a fun and unique drinkware favor that you can customize to promote your school, Prom, Homecoming dance, or school event. The 12 oz. travel tumbler features a high-quality stainless steel outer with a soft-touch feel coating, a black polypropylene insert, and a black, sippy cup-style lid. Customize the tumbler with your choice of one-color imprint to create a one-of-a-kind cup everyone at your school will love.