LAST choice is isopropanol (isopropyl alcohol). Isopropanol is easy to find at most any drug store (typically called rubbing alcohol), but it's usually a sooty mess to burn. Even though Isopropanol has the highest heat content per gram*, it is really not suitable as a stove fuel because it's such a mess to burn. Isopropanol is toxic in terms of both fumes and in skin absorption.
Do zagotowania tego garnuszka potrzeba ponad 20 minut