... carry, safe in use, non-volatile, stored for long time and long shelf life (kept well for over two years in ... can burn with 15-20 minutes, with strong flame, and the flame temperature up to 600 degree, smokeless, odorless ... , non-toxic, no residue after burning, and it takes about 15minutes to cook 250 gram rice or ... it on the slate, surface, sand beach, and then ignite it. fuel block