<P> Each of the ingredients of bubble tea can have many variations depending on the tea store . Typically, different types of black tea, green tea, white tea, or even coffee form the basis of this beverage . The most common black tea varieties are oolong and Earl Grey, while jasmine green tea is a mainstay at almost all tea stores . Another variation called yuanyang (鴛鴦, named after the Mandarin duck) originated in Hong Kong and consists of half black tea and half coffee . Some people add milk to the drink . Decaffeinated versions of teas are sometimes available when the tea house freshly brews the tea base . </P> <P> The milk in bubble tea is optional, though many tea stores use it . Some cafés use a non-dairy creamer milk substitute instead of milk because many East Asians are lactose intolerant and because it is cheaper and easier to store and use than perishable milk . In Western countries, soy milk options are widely available for those who avoid dairy products . This adds a distinct flavor and consistency to the drink . </P> <P> Flavorings can be added to bubble tea . Some widely available fruit flavors include strawberry, green apple, passion fruit, mango, lemon, watermelon, grape, lychee, peach, pineapple, cantaloupe, honeydew, banana, avocado, coconut, kiwifruit, and jackfruit . Other popular non-fruit flavors include taro, pudding, chocolate, coffee, mocha, barley, sesame, almond, ginger, lavender, rose, caramel, violet, and Thai tea . Some of the sour fruit flavors are available in bubble tea without milk as the acidity tends to curdle the milk . </P> <P> Other varieties of the bubble tea drink can include blended drinks . Many stores in the US provide a list of choices . Some may include coffee - blended drinks or even smoothies . </P>

What is in the bubbles in bubble tea