My child is also a high school student. After the beginning of this year, the school suggested that it would be safer to bring your own food. My colleague recommended him to use the Booney insulated lunch box, which was found to be really good after several uses. This lunch box is designed in layers. My family bought four layers, and fruits, meat dishes, vegetables and soup can be brought. Every day, we try different ways to supplement his nutrition. I usually put cooked chicken soup, sparerib soup or tremella soup on the bottom floor, rice, pasta and other staple foods in the middle, and green leafy vegetables and seasonal fruits on the top two floors to ensure balanced nutrition. When I came back in the evening, I asked him how the food was eating. The child said that the soup was still hot at noon and the taste was fresh. I felt that I really didn't buy it wrong. If you want children to eat well and eat well, this heat preservation box is a good choice.