I'm still happy drinking not-hot stuff, as I guzzle water at stoplights and it's hard to guzzle hot stuff, but,
I did run across this site a ways back, while searching for ways to mount additional water bottle carriers on my bike:
Steven M. Scharf's World Famous Bicycle Coffee Systems
hosted at:
http://www.geocities.com/scharf_steven/bikecoff.htm
and
http://bikecoffee.freeservers.com/
the site is pretty amusing, and actually pretty informative -- there's lots of info on various ways/products to carry hot beverages on the bike.
Mr. Scharf appears to be a man obsessed, and dedicated to sharing the joy of coffee with his fellow cyclists. He does not seem to be in favour of herbal tea.
-Cathy