Earthenware According to relevant public information, the common materials of bowls are stones and earthenware. Bowl is a container for making crushed food, which is inverted cone, generally 30 ~ 40 cm high and 40 cm wide. There are also smaller ones, about 10 cm high and 8- 10 cm at the bowl mouth. There are many lines radiating from the bottom of the bowl to the inside of the bowl.