When we initiate packing process for shipment. Against shipment we will create container along with its type. There must be an option to select container level (0,1,2,3). So once user select 0 it means it is the lowest level container and if user select 1 means it is a parent for 0 level container. This is possible through containerization process but it would be great if it is also available for manual packing process through mobile app.