SarahSimm: I am moving your post from the "Winter Camping" topic, and starting it here in a new thread under the "Camp Kitchen" topic. The thread in "Winter Camping," in which you posted your question, concerns hot tent heaters. I would rather not jumble that thread up.
Some topics, like camp coffee, have been discussed in depth here in past threads. It is perfectly fine to start a new thread, but it may be more effective, and you may get more focused responses, if you use the search function and refine your inquiry or refer to past suggestions and threads on the topic.