They are in the same way any canned good is. If you boil it, the can is likely to warp slightly and allow water in, also things like plastic liners and other chemicals can leech into your food, you generally aren’t supposed to cook food inside the cans they come in.
Wait are these cans not watertight?
They are in the same way any canned good is. If you boil it, the can is likely to warp slightly and allow water in, also things like plastic liners and other chemicals can leech into your food, you generally aren’t supposed to cook food inside the cans they come in.