Typically you put the food in the can and the cans the box and then blast the whole box in one go. Very useful for countries with limited access to refrigerati

Typically you put the food in the can and the cans the box and then blast the whole box in one go. Very useful for countries with limited access to refrigeration. This is also a common method for sterilizing single use medical stuff, band-aids, sutures, iv tubes etc.