Purely in the interests of of scientific research for educational purposes then: https://archive.org/details/usa-tm-31-210-improvised-munitions-handbook (Provided as an example. I have original copies from the 1969 edition from my Dad.) While fuel substitutes can essentially be any flammable liquid (a mix with used motor oil is good because the microscopic metal particulates suspended in the oil make it burn hotter) Some examples of field expedient substitute standard thickeners that can many people never consider are substances such as eggs and animal blood (as from a slaughterhouse). The molotov cocktail is most easily recognized by the rag sticking out of the neck. It tends to draw attention. The flameless molotov is simply the same device but with high specific gravity sulphuric acid added to the fuel/thickener mixture. Use a dark glass bottle. The label is removed from the bottle and soaked in a wet mixture of sugar and potassium chlorate, then dried and reapplied to the bottle, so that the finished product resembles nothing more than a normal bottle of wine, and can be carried openly without arousing suspicion.. Upon impact, the glass shatters and the acid reacts to the sugar/chlorate mix, igniting the fuel mixture. **WARNING: ALTHOUGH ALL OF THIS INFORMATION IS CURRENTLY READILY AVAILABLE FROM MANY OPEN SOURCES, DOING ANY OF THESE THINGS CAN BE HIGHLY DANGEROUS AND MAY BE ILLEGAL IN YOUR AREA. PLEASE CONSULT YOUR LOCAL LAWS FOR PROPER GUIDANCE.**