Putting beer bottles in the bread cellar can slow down the heat loss inside, thus achieving the effect of heat preservation. This can not only make better use of the residual temperature of the kiln wall to bake bread, but also make full use of beer bottle resources.

The structure of bread kiln mainly has three layers, namely, thermal insulation layer, thermal insulation layer and structural layer. The thermosphere is mainly clay and sand, and the ratio of the two is 3:7. The insulation layer is made of waste beer bottles, sawdust and soil. The structural layer is made of straw soil, that is, long straw, clay and sand.

When building a kiln, we should grasp a principle, that is, we should use the heat of heating to heat the food, instead of adding firewood while burning the fire. Therefore, toxic substances that are not completely burned may enter food, which may lead to cancer.