The cool tones of this Large Blue Color-changing Tumbler With Straw make it a smart favor choice for an Under the Sea, Under Water, Frozen, or Winter Wonderland themed Prom, Homecoming, or Senior Party. It's also great as a school fundraiser, school store item, concession stand inventory, or a student award. The 24 oz. durable plastic tumbler changes from blue to dark blue with the addition of ice and includes a coordinating colored lid and straw. Add a one-color imprint to one side of the tumbler to personalize it for your school or event.