Chai means tea. “Chai Tea” is redundant,
and it doesn’t make any sense whatsoever to
ask for some “tea tea.” If I owned a store and
someone came in using the phrase “Chai Tea,”
I’d probably get away with selling him/her my
oldest & crappiest bag for a hundred dollars
an ounce more than it’s worth because she/
he just revealed to me that they won’t know the
difference (and may even subsequently thank me
about it later like a fool).