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I use this tiny little thing (one on the right). It's small cools down fast and good enough for 2 hot meals plus hot drink per day for a week with a small iso can.
Fairly cheap too, I've used mine for 4-6 years now with no problem.
Only cons I've experienced are trying to cook for more then 2 people, and the flame can be very hard to see in daylight so make sure it's fully out after use.
Food needs may vary but I normally make pasta, oatmeal, sometimes rice, and fried spam. Hot water for coffee and apple cider.