I work in food production of food, primarily soups that goes in a can. Its not small and its not cheap, maintenance heavy, and takes a lot of power. Starts with a kitchen with giant kettles then out to a filler that puts in the soup and separate area's that add ingredients than a lid machine that attaches the lids all the while dozens of checks are going and then its off to a cooker and I mean huge cooker where the cans heated by steam to high temps to kill off bacteria. Its a multi man job up till that point. We could skip the labels and packaging but those are still manpower intensive jobs. And we don't make or grow the ingredients or the cans or lids. Those come from outside sources. Can's are a great idea if that's what your eating, but making canned goods is a nightmare unless you have a preset up line and trained personnel and lots of spare parts and plentiful supply. Even something as Chicken Soup broken down to its most simple form of just chicken, water, and noodles and salt is going to take a large supply chain.
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