You’ll be Over the Moon When You See These Rocket Stoves!

Made from cinder blocks or bricks, rocket stoves are a quick, easy, inexpensive way to start an outdoor cooking fire. They can be made using cinder blocks or bricks, and use twigs and grasses to burn.
Pros and Cons of Rocket Stoves
When TSHTF, the last thing you want to do is let people know that you have food cached away. Food preparation should be done in secret.
A community rocket stove may not be safe for you to cook food on, but you can share it with your neighbours to boil water. This is useful for killing bacteria in drinking water (and nobody needs to know that you invested in a water filtration system before TSHTF!).
You can also put boiling water into a thermos (always heat it up with hot water first, then ditch that water, and refill) for a day’s worth of coffee, tea, bouillon … or thermos cooking. Cook oats, beans, rice at your leisure, indoors, with no additional cooking fuel required.
If you really want to be prepared, you can gather or buy the bricks or cinder blocks in advance, and then just leave them lying about somewhere where they’ll be ignored. A back alley, perhaps?