:yikes:I hope you mean a couple of Litres and not liters or Lighters as you could end up with a self made one that has no front on it (and a scar like I have on my left wrist - welding a filler neck onto a supposedly "safe" fuel tank)If it's not been used for while then this is just for belt and braces, use some hot soapy water put a couple of liters in, close top, swill about for a while and epmty, or leave with the top open for a couple of days to de gas or both untill your happy.