Cans of soup and baked beans, microwave sachets of rice, tins of fruit, sardines, boxes of fruit juice, biscuits, chocolate, nuts, tins of corned beef, dairylea, peanut butter, jam, crackers, crisps, cereal bars, spaghetti hoops, jars of olives, pet food, Christmas cake, dried fruit, popcorn, long life milk, tins of custard,. A million things that are calorie dense, can be eaten cold and keep for ages.