I hope this isn't off topic.
After having recently been on a pearl tea binge,
(Super 88 in Allston - Lollicup - milk tea excellant, almond milk was a little too sweet.
Dado on Mass. Ave in Central Sq., Honeydew - very good - very expensive.
Porter Square/Japanese mall - almond thai tea - excellant)
I want to make this at home. The Super88 didn't have the black tapioca balls - I was hoping to avoid purchasing them online. Does anyone out there know of a good source? thanks!