Looking for some gifts for that special someone you really want to survive the apocalypse with? How about an Alcohol Burning Stove?
These tiny, pocket-sized devices can use a variety of fuel: denatured alcohol, Rubbing alcohol, HEET fuel additive, Grain alcohol... just about any flammable fluid. (for indoors use, stick to the denatured or wood alcohol, which burn a lot more cleanly).
This little stove will not only boil water, it'll heat a skillet sufficiently to dry meat. Add in a small pot r skillet, a flask of fuel, and a disposable lighter, and you have everything you need to cook meals in a pinch--from a simple can of chili or pasta to a complicated mix of powdered eggs, canned cheese, and fried spam for a tasty post-apocalyptic omelette.
Unlike a lot of survival gear, alcohol stoves can be found on Amazon for less than $15.00, and they'll fit in that special survivalist's Christmas stocking. And don't worry about whether or not they already have one--you can never have too many of these, particularly if you're cooking for more than one person, or trying to make multiple dishes at once--traditional stoves come with multiple burners for a reason.