The quinine in tonic certainly fluoresces, but I don't believe anything in gin does.

( The Mock TurtIe ™ --- Thinks you are a cunt, on, Tue 1 Jul 2008, 22:50, archived)

I was going to ask
but I appear to have been forestalled.
( wynoh kills threads by his mere presence, Tue 1 Jul 2008, 22:51, archived)

en.wikipedia.org/wiki/Image:Tonic_water_uv.jpg
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Tue 1 Jul 2008, 22:55, archived)

that's so cool

( Jadeviper was still alive on, Tue 1 Jul 2008, 22:57, archived)

that could be it then :P
my comment still stands, with minor adjustment
( Jadeviper was still alive on, Tue 1 Jul 2008, 22:52, archived)