I used something that I think was pro-ethanol in my Trangia last week as I'd run out of meths. It burned hotter than meths but made terrible smoke & soot. Soot would get into the food too if it wasn't covered (easy with a pot, difficult with a frying pan). I'd stick to meths, which I get at a fairly good price in my local independant hardware shop. I think I paid £12 for 5L recently.