Trioxane burns clean and hot, packs easily and compactly. These mil-spec heat tablets will heat military rations, camp foods, and will even boil water. Put some in your survival kit as a quick, reliable firestarter. One box of three tablets that are 1.25x1.75" and are sealed in water-proof foil. Great for use in folding camp stoves, Esbit stoves, or as a fire starter. 3 tablets to a box.