Because some like pearls of wisdom at the bottom of every cup...
Also known as boba drink, pearl tea drink, boba ice tea, boba, boba nai cha, zhen zhou nai cha, pearl milk tea, pearl ice tea, black pearl tea, tapioca ball drink, BBT, PT, pearl shake, bubble tea originated in Taiwan in the early 1980's at a small tea stand.
Bubble drinks are usually cool, refreshing, and a sweet drink with tapioca pearls sitting on the bottom of a clear cup. Sometimes the drink is made with fresh fruits, milk, and crushed ice to create a healthy milk shake. You can also find drinks that are made of powdered flavoring, creamer, water, and crushed ice. And if you like it like the Asians do, the cool drink usually includes a healthy tea, infused by a flavoring.