Yes, I believe BaLe uses one of these sealing machines too.
However, I think they make their drinks in-house (they seem
to sell a lot of their drinks, and other products, to many
outside vendors as well).
I haven't been to Mitsuwa or HMart, but I'll second Barbarella's
assertion about Joy Yee. I've never seen a larger list of different
kinds of bubble teas.
For what its worth, I would not even consider Cafe BeBoBa,
or whatever its called, worthy of being listed in this discussion.
Unless that is, they've overhauled their drinks in the past
couple of years. As I stated in an earlier post in a different
thread, they don't even use real fruit in their drinks - just
powdered, chemical flavorings.