Could you really survive the apocalypse by eating freeze-dried food? Is it really a good idea to store freeze dried food for a long-term survival situation? It may be an attractive proposition for the survivalist in you, but you probably didn't bargain on what exactly the process of freeze drying involves — and its price. HOW TO CARRY A TON OF FOOD ON YOUR BACK The process of freeze drying plays with the properties of water within food. When freeze drying, a cooked portion of food is flash frozen under a vacuum. At low pressure, all but 2-5% of the...