This 200ml pouch contains the eco friendly fuel 4 bio ethanol gel fuel it is a safe non toxic non spill non explosive fuel source that is smokeless and does not harm the environment made from use with the fuel 4 x1 and x2 stoves it will burn for 60 90 minutes depending on your usage ideal for festivals that do not allow gas stoves or barbeques and just as great for camping trips fishing or even home use