1. an empty soda can for the pot some other type of can like a veggie can and
2. a few sheets of toilet paper, paper towel, cardboard or other absorbent material, including sand. (...but no synthetics!)
3. a level, flat and fireproof surface (or a second empty can of approximately the same diameter as the pot can or a little larger - preferably with a bottom that will fit or accept the soda can bottom nicely - see photos).
4. a fire starter of some type, like book matches or a sparker, to light the fuel
5. 91% Isopropyl alcohol. 70% may work directly and if not can be "salted out.". Fuels that float on water are not recommended.
6. provision for venting of exhaust fumes and allowing intake of fresh air if used in a confined space such as inside a car.
I used 91% Isopropyl alcohol for fuel since I always carry a little with me in a spray bottle to kill germs after shaking hands, and as fuel for the laminar or pressure can stoves I carried with me in case I was overcome by the ultralight backpacking urge. This personal pocket stove, however, (except for the weigh of the fuel) is so light it will even support super ultralight backpacking!
All alcohol fuels should work if the proof is high enough. Even kerosene or jet fuel might work (in case you are in an airplane accident) but the stoichiometric ratio will be lower, i.e. lots of soot. I would not resort to gasoline or other highly volatile, high energy fuels due to the low temperature of combustion, unless you have absolutely no other choice. In any case the pot you use with high energy fuels should be made of steel, even if filled with water, rather than aluminum.
If you anticipate having only gasoline available in such an emergency (from your car's tank) look for stove designs intended for use with highly volatile and high energy fuels. Warning: fuels other than alcohol such as gasoline may burn hot enough to melt aluminum while fuels like oil or mineral spirits may produce an unacceptable amount of carbon monoxide and soot, with this design.
Also, DO NOT REMOVE POT FROM STOVE UNTIL THE FLAME GOES OUT WITHOUT A SECURE (WEIGHTED) INTERMEDIATE STOVE COVER SUCH AS A STEEL CAN TOP OR YOU MAY HAVE TO DEAL WITH A FLARE UP BY IMMEDIATELY RETURNING THE POT TO THE STOVE.