For me, a tie between a nice knife and a large pot. You can use a pot over a camp fire or grill, so a stove isn't up there. Without a knife, what can you do? Use an axe to chop an onion finely? Without a pot, there's no where to put the food to be cooked. It cant be heaped on a pile of wood to be cooked, so a draw between a large pot and a knife. With a large pot, soups can be made, roasts can be made, anything. With a knife, food can be cut to a desired size, fish can be filleted, etc... .For stirring the pot, shake the pot and if necessary, use the knife as a spatula. All that's missing is a heating source (fire can be made) and food.