Many will say a gallon of water per day is what you should be drinking EVERY DAY. I try to drink a lot. When I succeed I don't feel nearly the same urge to snack on those days.This is SO interesting - and now I have more questions (which is what makes it so interesting). Would it be as effective to simply keep sipping water throughout a meal? I've noticed that I feel full after a cup of coffee - often I feel more full than if I'd had food. Hmmmmm. Thanks for giving me something to ponder.