A ttukbaegi (Korean: 뚝배기) is a type of oji-gureut,[1] which is an onggi coated with brown-tone ash glaze.

[2][3][4] The small, black to brown earthenware vessel is a cookware/serveware used for various jjigae (stew), gukbap (soup with rice), or other boiled dishes in Korean cuisine.

(Ddukbaegi-e-neun jang-eul ggeurigi maryeon ida; 뚝배기에는 장을 끓이기 마련이다.)"

(namu ddukbaegiga soe yangpun doelgga, 나무 뚝배기가 쇠 양푼 될까?)"

"I broke the ttukbaegi and spilled the soup (ddukbaegi kkaego guk ssodassda, 뚝배기 깨고 국 쏟았다)" is an analogy to mean that one mistake will result in a loss many times.