Comment by thaumasiotes

> the invention of chai tea (spiced tea)

For the record, "chai" is just the word for tea; spices are not implied. It does not seem to have been introduced by the British, who knew it as "cha" very early and "tea" for most of their tea-relevant history; the "chai" form comes from Persia.

https://en.wikipedia.org/wiki/Tea#Etymology

But the British did give it a promotional campaign, during which they fought against the native tendency to add spices:

https://en.wikipedia.org/wiki/Masala_chai#History