Bubble tea is a drink that is a mix of tea, milk, sugar, and giant black tapioca balls. The "bubble" refers to the foam created by shaking the freshly brewed tea with ice. It is also called boba tea, tapioca tea, boba nai cha, pearl tea, milk tea, bubble drink, zhen zhu nai cha, tapioca pearl drink, momi, momi milk tea, QQ, etc.