4. Jetboil Flash Personal Cooking System
You will have to get some fuel canisters, but each of these small items can boil up to 100 cups of water, so they will last for a long period of time.
This is an easy, efficient way to make everything from coffee to freeze-dried meals, and the container will also keep your liquids hot for much longer than usual.
At $75 to $99, this might seem like an extravagant extra. However, it will simplify the cooking process.