OH makes these for burning on the open fire and the Rayburn - good way to use up all the loose coal dust from the bunker. Make a mix of 80% coaldust and 20% cement, with a little water to almost bind, mix well and pack into cardboard tubes = almost free fuel. They burn well, and he assures me theya re safe, but I'm not sure about the earth friendliness of the cement. It works though.
