A pack of the AlpineAire Trek N Eat NRG-5 Emergency Food Ration covers the daily energy requirement of an adult. Ready-to-eat, no heating or boiling required. It can even be given to children as young as 6 months old. You can even crush the compressed bars and add water to prepare a nutrition mash or an energy drink depending on the amount of water added. FeaturesLactose Free20 shelf life2300 calories