You can definitely see the use for preppers. And to be honest, these aren’t even new items either. When I was growing up, my parents had a pot belly fireplace with a flat surface on top that we’d boil water, pan fry eggs and even cook dinner. Nowadays, I have an electric kettle and electric stovetop. If the electricity was to go, I’d be using my fire stove for everything.
It’s impossible to carry all the food you will need for a week unless you’re eating very high density proteins like nuts. Nuts and dried meat are two of the easiest off-the-cuff meals. Canned food has a lot of water that is wasted during the cooking process. Stay away from heavily flavored or salted nuts. The amount of salt present in the unsalted nut mixes is still sufficient enough to replace electrolytes.