Starbucks' Butterfly Pea Flower Lemonade Cold Brew Changes Colors

Starbucks is launching a brand new drink just in time to welcome the spring season: the Butterfly Pea Flower Lemonade Cold Brew. This eye-catching beverage is layered with an unlikely combination of espresso, lemonade, and butterfly pea flower tea — a trendy ingredient used in Southeast Asian cuisine and famous for its vibrant blue hue and color-changing characteristics.

The butterfly pea flower, also known as "Asian Pigeonwing," is employed prominently in Malaysia to naturally color rice and cakes, and in Thailand, where it's served as a syrupy welcome drink. It's even sometimes consumed with citrus juice, in which case the high acidity turns the substance to a pink-purple.

The plant's colossal popularity in these parts is perhaps the reason why the limited-edition cold brew will only be available at Starbucks shops throughout Asia starting February 20. And it is only served iced.

For more international products you'll likely never see stateside — such as Purple Yam Cheesecake and Dragon Dumplings — feast your hungry eyes upon these 16 Starbucks food items you won't find in the United States.