it depends on the food you put into the foil
So that food can be conviently stored and preserved in long term.
food to keep them alive
Well if its spoiled or "gone off" its bad, why keep it?
There is A LOT of food in the world, there is a never ending amount of it as long as animals keep reproducing and plants keep on growing.
The best way to keep food warm for a long time is to use an insulated container or a slow cooker. These can help maintain the temperature of the food for several hours without overcooking it.
Most any cooked food will keep in the refrigerator for about 3-4 days.
too general . Need Specifics
Through their refrigenerater.
Three or four days is a safe amount of time to keep food as long as it is refrigerated.
The best ways to keep food warm for a long time are using insulated containers, slow cookers, chafing dishes, and hot holding cabinets.
You can safely keep most food in the refrigerator for 3-4 days before it should be thrown out to prevent foodborne illness.