Paraffin/Wax/Candle Stoves Wax has a lot of heat potential per ounce but can be difficult to harness enough to make it worthwhile as much of the heat is used to melt the wax and some of the fuel will go unburn and blacken your pot. Stoves fueled by paraffin wax (not to be confused with kerosene - often referred to as paraffin) generally incorporate a wick and are basically wide candles with enough wick(s) to cook. Unfortunately, paraffin wax stoves can produce a lot of soot and don't always work in the wind. Some candles stove setups are only capable of warming food and wont' bring water to a boil, but these same setups may work adequately for melting snow if you're willing to sit and tell stories in your snowcave while your stove does it's work. Candle stoves are nice to have since they can be used as emergency heaters, zipper unstickers, match waterproofers, fire starters (melt over kindling), reading lights, night beacons and to help produce the right atmosphere for telling scary stories. These are also one of the few fuels left that you can take on an airplane.
link takes you to many different stoves, some you can easily make at home
Buddy Burners (aka Wax Survival Stove)
3.6oz Wax over corrugated cardboard in candy tin
Note Candle wick in center to allow for lighting Homemade candle stoves have also been around for centuries. It doesn't take much imagination to envision one of Merlin's alchemists in a darkened room boiling up a small tonic with the heat from a smoky tallow candle. Commonly referred to as Tuna Can Stoves or Buddy Burners, a simple and more modern candle stove can be easily made by pouring melted wax in a metal can (tuna or 7oz cat food is fine) filled with rolled up corrugated cardboard (center wick is optional). If you over fill the wax so that it covers your wick, use a knife to scrape it off before trying to light it.
These candle stoves have several good qualities. They are completely waterproof, don't spill when stored, are easy and economical to make, are not an explosion hazard, don't decompose like other solid fuels, don't require any environmental constraints for storage and are ready to use as is without any special stove or equipment. Their indefinite storage life and easy of construction/use makes them ideal for stockpiling for an emergency. This makes them also popular with survivalists and the Zombie Apocalypse crowd.
People who actually use this type of stove to cook report that using a cardboard to section off the wax as shown above allows for better air flow to the gasified wax. This allows more of it to be burned.
Wax Stove Notes
Note: A clean metal can (such as a 12oz drink can or soup can) works fine for melting wax if you don't desire waxing a good pot.
Liquid Wax/Oil Burners Liquid Candles
Plastic Liquid Candle Liquid candles are just like solid candles in that they require a wick to vaporize fuel for burning but also need some sort of holder. Ready made liquid candles can be purchased in either refillable or disposable plastic containers such as the one above (also available in tealight 1oz size), all of which can be refilled (use a needle and syringe for or squeeze fill the non-refillable types) with various flammable fuels and oils.
Vegetable oils, candle fuel, lamp fuel and other liquid oils can be burned with a wick but can be quite sooty, depending on your lamp, wick (type and length) and fuel. Remember that some oils will solidify or gel at low temperatures encountered on winter treks.
Plant/Vegetable Oil Stoves (aka Pflanzenölkocher)
A simple, yet adequate, stove can be made from an aluminum can, aluminum foil and tissue paper. Fuel such as plant or vegetable oil will allow you to cook with this stove system.
Note: According to lodge-tech.net Veg-oil-Stoves:
"Soy bean oil is classed as a drying oil and will leave a residue on metal parts and wick and should not be used, Corn oil leaves a crusty residue on wicks and should not be used. But blends of various oils including these are possible, and can be explored."