Maybe this is passe by now on the mainland, but I just found "half size" (8oz) cans of CocaCola at my market. Im sure there were other coke products, but I didn't bother to unglaze my eyes long enough to look around.
Yeah, I'm paying almost as much money for half as much soda, maybe even more. But it is so nice to have a 'guilt-free' size and know that I can drink the whole thing before it goes flat. Just enough for my afternoon "fix". Hooray Coke!