Hexamine fuel tabs (by Esbit or Coglan's available from Amazon. You can get the small ones (.02) oz. Squeeze a little Purell hand sanitizer on them and hit them with a striker on a magnesium rod and they light first time, every time and burn hot. The larger tabs will burn for 9 minutes (as another poster above noted). Hexamine has a shelf life of about forever. Put the Purell in a 1 oz. squeeze bottle and it will have a shelf life of damn near forever too and the 1 oz bottle will accelerate the lighting of dozens of Hexamine tabs.
