Just attach a chimney and you'll have a rocket stove in no time! 

Attach the chimney only when necessary.
This way, it can be transformed into a rocket stove in no time.
This time, we actually made a bonfire.
The fire burns quickly with the rocket stove.
Once the fire is lit, remove the chimney and enjoy the flickering fire.
Put in a large piece of wood and quickly transform it into a rocket stove when it starts to smoke.
The smoke will then be sucked into the chimney and burned.
This is a very easy-to-use fire pit, so please see it through to the end.