All right, I couldn't let a tune contest go un-answered!
So I spent a few hours and wrote Highball
(that's a link, by the way). It's not very inspired, sorry. But it did make me do a little research into cocktails, since frankly about the strongest thing I drink is the occasional glass of wine. Apparently the original highball is now called a "Scotch and soda." Hence, you have the scotch -- the musical representation of which, of course, has to be bagpipe music, here approximated with oboes, plus a bass clarinet, bassoon and contrabassoon for the drone. And you have the soda, which is your typical water type music, with the harp/flute thingy representing the effervescence, and the brass adding at least a small bit of interest before the Scotch comes back with a vengeance.
Ordinarily, I wouldn't win any prizes for this piece of rubbish, but seeing as I'm the only entry so far, perhaps I may be luckier this time....