Survival tabs are ultra high calorie food tablets that provide all essential vitamins and minerals. Fits easily into 72 hour kits and bug out bags, adding just under a pound. 10 Year shelf life, and the chocolate ones are tasty!
100-Year-Old Way to Filter Rainwater in a Barrel - If you want filtered water right from a rain barrel this is for you. For gardening, rainwater is, naturally, best unfiltered, But for household use, the vintage book says the following instructions yield a cheap and easy way to make a filter just as good as a patent filter costing 10 times as much.