The hex stink tox stink esbit just a little.I thought i try one just to see what was what well burn time 5 min. 15 sec. 16 oz. water 201F.now that not bad also just befor it gets low could put a few twigs if need be.Oh the first test was the round ones just now tried the sq. ones stink bad burn time13-1/2 min. and it made a boil.use it all up
