in reply to I refer to a non-specified carbonated beverage as a:

Actually, since my choices in drink are somewhat limited to diet I just tell a waiter or waitress "whatever you got that's diet.."

I have over my lifetime lived in so many parts of the USA that what I generically call a carbonated beverage is quite random. I've been heard to say "soda", "pop" or whatever sometimes in the same sentance! ;-)

Peter L. Berghold -- Unix Professional
Peter at Berghold dot Net
   Dog trainer, dog agility exhibitor, brewer of fine Belgian style ales. Happiness is a warm, tired, contented dog curled up at your side and a good Belgian ale in your chalice.