How to get your free 2021 reusable red holiday cup at Starbs adores the color-changing drinkware! Coffee enthusiasts are hooked on the magical cups that change colors color-changing tumblers. With its innovative technology, the starbucks color changing cup shades its hues instantly. These cups have become trending items, fueling a craze among caffeine lovers. Starbucks knows how to amaze and captivate its devoted fanbase with its creative additions. Cheers to Starbucks for bringing magic to our daily coffee ritual with the magical colorful cups!