Cooking over an open camp fire isn’t exactly the most predictable way to cook. It’s easy to char the outside of a meal, while leaving the inside raw or under cooked. Cooking in a pan is even more unpredictable, plus you constantly have to monitor your meal to ensure it doesn’t burn. However, boiling water over a campfire turns out the same result every time – boiled water. If you have a thermos, you can add boiling water to your ingredients, let them simmer for a while and when you come back, you’ve got a properly cooked (read unburned) meal waiting for you.