The presented diagram suggested three stages in progress of simple cooking equipment. Overall, the cooking equipment underwent a substantial improvement, commencing with being a stone and concluding with modern tool which have a huge number of details.
As can be seen in the graph, the first type of cooking equipment is just a tall stone, surrounded with sand, grass and branches. Second stage upgraded into a clay shield with a hole in the middle of the tool into which branches were stuck. Inside of a clay shield contains three rocks and branches inside of it, without being covered from the natural environment.
The data suggest that the last stage of cooking equipment has more details. It acquires a door that lets ash and air inside of the tool. The tool is made from the metal, the grate for charcoal which is established inside of the cooking equipment and it is held with support for the pot. The grate for charcoal is surrounded by the clay lining and handle.
