So us people could learn more about them and their everyday life.
Of course it is lol so why do you ask
what image? please add an imagine next time....
Some of these vessels have a cup-shaped cover over the mouth, so that they seemed to be used to store high quality wine such as insamju (인삼주, ginseng wine) or maehwaju (매화주; rice wine made with plum)[6] It would have originally had a lid and there are many maebyong with ginseng leaves on the surfaces.[7]