> Or you could simply invite them to dinner and serve something really
> nice, without comment.

.... and it may well be wasted, because they aren't paying attention.
"Try this, I think you'll like it. Let me know what you think." at
least focuses the attention, so that your classy wine has a chance to
make an impression.

Jose
--
"Never trust anything that can think for itself, if you can't see where
it keeps its brain." (chapter 10 of book 3 - Harry Potter).
for Email, make the obvious change in the address.