Soban is a tray-like table for carrying food from the kitchen to a room located across the courtyard for dining. Soban became popular during the Joseon dynasty when adults and children ate their meals separately, and in accordance to social rank individuals were served with separate dining tables. For this reason, households at that time usually had several soban. Therefore, soban were produced in various styles and shapes in consideration of class and function, and were classified according to regional characteristics: Haeju, Gangwon, Naju, and Tongyeong, among others. Soban for daily use usually has a shoulder-width diameter and a height no higher than chest level, which would be suitable to be carried in accordance with a traditional living style. However, the actual sizes and heights varied depending on function. The wood for soban had to be light and not prone to warping. Therefore, gingko, lime, and zelkova wood are the main materials used for soban.