It is a mystery. Almost pointless to ask, I think.

Yours is the one without the small black spheres at the bottom.

[Straws are a new thing for her, so when she takes a sip of her boba tea the novelty of sucking up a tapoica pearl along with her sweetened tea is amazing to her.]

Oh, wow, this drink is so strange!

[Taking another slurp and chewing the pearls!]

You should try it too!