If you can do this at the summit of Mont Blanc
http://www.jaccuzzi.ch/html/les-jacc/63/26b.jpg
then I can't see why you can't take tea up there - as long as one remembers to take one's gentleman's gentleman along to prepare and serve the Earl Grey, of course ;-)
No, but its priddy big if you're a kid....
and here is a American Papa taking ttwo kids up
and getting it in the neck from those safety conscious froggies