Storing okra and tomatoes (Sudan) - In hot climates, food doesn’t stay fresh for long. Tomatoes go off in just 2 days. After 4 days carrots and okra are rotten. One solution is the zeer pot. It’s a low-cost fridge that doesn’t need electricity. Using this simple technology, the same vegetables can last for up to 20 days. It’s made up of one pot inside another, with wet sand in between. As the moisture evaporates, it cools the inner pot, keeping up 12kg of produce fresh for up to 3 weeks.
Butter in Your Food Storage. the best tutorial so far I've found.. Idea from the comments:My cousin makes this... but shakes the butter a few times as it cools. When it is finished, it is nicely blended, the consistency of soft margarine or butter from a tub, no mixing needed, great for spreading on toast just as it is. She now cans all her butter and rotates it into her years supply.