One of the rules when rationing yet water is plentiful is that, generally when one is hungry, drink water instead. Unless coming close to a gallon of water per day this is a better option than eating and satiates similarly. However, this is obviously not a long term solution and was mostly a "field solution" to hunger, [@Hellion]. One of those survival principals that is very loosely based and it does indeed work, at least in my experience.