1. Hard plastic material. This lunch box has good high temperature resistance and is not easy to decompose at high temperatures. It is a relatively healthy lunch box.
2. Stainless steel material. If high temperature heating is not required, then stainless steel lunch boxes are also suitable and healthy.
3. Heat-resistant glass material. This lunch box can also be heated in a microwave oven and will not decompose harmful substances. It is recommended to use it.
4. Inferior plastic material. This material is not resistant to high temperatures. After heating, it will decompose some substances that are harmful to the human body. It is recommended not to use it.
5. Paper box material. This lunch box is very simple and not suitable for overheating. It is okay to put food at room temperature.
