Sidenote #2: As with a alcohol stove, do NOT replace the recommended fuel (twigs) with Coleman fuel/kerosene/gasoline/cat/etc.
The use of any liquid fuel in this kind of a stove would probably be messy. It would probably be difficult to stick the chimney can on top of the other two, after you ignited the liquid fuel pooled at the bottom of the largest can. It would look more like a distress signal than a camp stove.