I could get sugar-free sodas, but not very people seem to actually drink those and I don't like having leftovers of things I won't use up. I always have tea, but haven't had much luck arranging it in such a fashion that people are aware it's available. (Actually, come to think of it, I could make up iced tea in advance and put a nice big label on the pitcher in the fridge; that should be fairly clear. Still not sure what to do to indicate availability of fresh hot tea, though.) What else is more interesting than water but not chock-full of sugar?
 cold, mulled, hard, and sparkling