Reply On October 13, 2011 at 2:42 pm dodo said: That chart is kind of funny (craving tobacco may mean you need silicone!) And it says ???you need 8 to 10 glasses [of water] per day,??? which (a) a glass is not a unit of measure and (b) I???m pretty sure this has been debunked; 64 oz. or whatever was actually water from all sources, including food.