These solid fuel cubes by Esbit are perfect for backpacking, camping, and emergencies. The cubes are virtually smokeless and residue-free. They can be used to cook and heat food and beverages, boil water or start campfires. The cubes burn for approximately 12 minutes – reaching up to 1300 degrees F. One cube will boil 500 ml of water in about 8 minutes. The Esbit fuel cubes work at high altitudes and in sub-zero temperatures. They will simply light with a match or lighter. Check out the detail and order on Amazon here!