Oh please, please, please... change the color of the jerry can for Flame Thrower fuel. Make it red instead of the same fuel can as Biofuel. There's nothing more disconcerting that running out of fuel while barbequeing Zirax because you grabbed the wrong thing!
Or the converse - long walk on aird planet to go chop down some trees thinking you had chainsaw fuel only to find out to you horror that it was flamethrower fuel and have to walk back - Grrr!