Personally, I do not concern myself with much in the way of feel-good food items. I dont need coffee to survive and I am not sure that drinking coffee is worth the use of water in regards to maintaining hydration. If I feel I need to enjoy some sort of consumable in order to improve my mental state, I will chew some juicy fruit gum. My water consumption during a real crisis would be strictly regulated in an attempt to stay on top of proper hydration. I have dealt with the effects of dehydration and it aint nothing to play with.