The Most Beautiful Hand-Shaken Drink Shop with Authentic Ingredients! A Yunlin-based hand-shaken drink brand, the store name is a homophone for the founder's surname, "Guo," and the local Minnan language term "KUO-I," which means "gou yi" — a phrase conveying sincerity and reliability. The drinks use seasonal fruits from Yunlin, such as Gu Keng grapefruits, mandarin oranges, and Xi Luo watermelons, paired with carefully selected tea leaves and ingredients, offering a pure and natural flavor that delights food enthusiasts. The store’s bright and vibrant interior design has also made it the first Instagram-worthy café in Mailiao.