Customisation as the format
A description of something people do now, compiled from published accounts rather than from practice.
Ordering conventionally specifies sugar level and ice level as percentages, along with the topping. That vocabulary originated in Taiwan and travelled with the drink, and it makes bubble tea one of the few beverages where the customer routinely specifies formulation rather than choosing from fixed options.
The origin is genuinely disputed
Specialists disagree. TeaHQ does not pick a winner.
At least two Taiwanese tea shops claim to have invented the drink in the 1980s, and the dispute has been pursued at length including through litigation. TeaHQ records that the claim is contested rather than selecting a version, because the popular accounts differ and none is settled.
Why it matters to a tea catalogue
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Bubble tea is how a very large share of younger drinkers encounter tea at all, and the base is real tea brewed strong. Treating it as outside the subject — which a good deal of speciality tea writing does — misdescribes where the category's audience actually is.