This is the real US Military issue canteen cup stove, not a cheap imported copy. Holds the canteen cup so you can use a trioxane or Esbit fuel tab, or feed a fire with small twigs and wood if need be. Then, when you are done simply turn it over and it drop right into the canteen cup for carry! Every Canteen set you have should have one.
As with most light items, you are better off ordering this in conjunction with other items or ordering multiple ones for best shipping rates.