1. The lunch box has two layers and three layers. The two layers have two inner liners, one for the annoyance and one for the soup. The third layer is to add a gallbladder to the soup on the basis of the two layers. The capacity of the two floors is 1.3 liters and the capacity of the three floors is 2 liters.2. The middle layer of the three-layer lunch box can be used to steam eggs.3. This product can not only be used to heat meals, but also to heat the cold rice, but also to make the raw rice into a mature rice, more fresh.4. The working principle of the lunch box is to use water steam to heat it. When hot rice is used, water should be added to the base. If it is not added with water, it will dry up. It shows that the indicator light is on and off. Water, the base should also add water.5. When the water is boiled, it will be automatically disconnected.6. Regarding the black stain on the stainless steel inner tank, the stainless steel mud that has not been wiped clean after the pot is polished, please clean it with warm water and white vinegar or cleaning detergent before using it for the first time.