Preppers Magic Water

When recommending a piece of equipment this is probably the only military device I recommend to preppers. This is inspite of my own military experience. In most other cases the civilian market has better gear. I also know that looking like a soldier will make you a target.

The army canteen is what you're looking for. It comes with a metal cup/pot to cook with and boil water. This after filtering allows you to cook and eat. These are inexpensive running $5-$12. For these reasons this is probably the most important prepp.