Starbucks is calling a limited-time beverage that changes colors and flavors with a stir of the straw a "Unicorn Frappuccino," the AP reports. The chain says the drink was inspired by the trend of unicorn-themed food online and starts out purple with a sweet and fruity taste. It changes to pink and tart after it's stirred to mix in a blue drizzle. It will be available from Wednesday to Sunday in the US, Canada, and Mexico, with a 12-ounce size containing 280 calories. USA Today says the Unicorn Frappuccino "either sounds like a dream come true or truly disgusting." And Eater quotes an anonymous Starbucks employee who got an early sample as saying it "tastes just like those Tropical Skittles." We'll have to wait until Wednesday to see what actual customers think of the colorful creation. (More Starbucks stories.)