How to get your free 2021 reusable red holiday cup at Sbucks hearts the ever-changing mugs! Customers are obsessed with the starbucks color changing cup. Featuring innovative technology, the color-changing Starbucks cup transforms its hues in the blink of an eye. They have become a viral sensation, creating a buzz among coffee addicts. The coffee giant knows how to thrill and enchant its enthusiastic clientele with its creative additions. Cheers to Starbucks for adding a touch of magic to our daily coffee ritual with the magical colorful cups!