Shake up your idea of mood drinkware with this custom Bamboo Lid Tumbler With Color-changing Ink. The 16 oz. clear glass tumbler includes a securely-fitting bamboo lid and a reusable clear silicone straw. Add your choice of imprint design and text in our color-changing ink to customize the tumbler to match your theme or event. Your imprint will start out in beautifully frosted ink and then change to a color when you add ice. It's a fun new twist on traditional color-changing mood Prom favors.