This is a Banko-yaki earthenware pot for cooking one go (about 180ml) of rice. It's convenient because you can cook rice with it directly over a gas stove or in a microwave. For microwave cooking, put one go of soaked rice and water in the pot, place the inner and outer lids, and cook at 500W for 10 minutes, then let it steam for 20 minutes, and it will cook beautifully. To prevent the rice from boiling over in the microwave, you might want to place the pot on a heat-resistant plate inside. For cooking over a direct flame, cook over medium heat for about 15 minutes (reduce the heat if it looks like it will boil over), then remove from the heat and let it steam for 10-15 minutes. I researched and carefully selected this pot, but I made a mistake with the size, so I'm offering it to someone who wants a one-go cooker. I've used it once each in the microwave and over a direct flame. There is no box.