If you ask for a cup of water in a fast food restaurant, you'd better not be thirsty.
More often than not I drink water with my meals, so it drives me crazy that fast food restaurants never give you a decent cup of water. Why can't they simply give you water in the same sized cups as they do soda?
If you ask me, it should be the other way around. Soda isn't very healthful, so it should come in tiny cups.