Capacity of round bento box: 680ml This is a set of a round bento box and a lunch bag. The bento box has a removable structure, and the inside is made of stainless steel. By pouring hot water into the container and then setting the stainless steel inner layer, it can keep food warm for about 1-2 hours. The stainless steel container is also compatible with heating on IH (induction cookers) and in ovens. Used only once. Both the bento box and the lunch bag have a cute cherry pattern, making them a perfect design, especially for girls. Please note that I am selling this because the expected heat retention effect was not achieved. Recommended for those who don't mind a cold lunch. Thank you for looking.