1. glass lunch box: including utensils made of borosilicate glass, microcrystalline glass and titanium oxide crystalline glass, but pay attention to the temperature range of high temperature resistance.

2. Ceramic lunch boxes: there are heat-resistant ceramics and ordinary ceramics. Heat-resistant ceramics can be heated for a long time, but ordinary ceramics are advised not to be heated for too long. In particular, it should be reminded that the ceramic lunch box with gold and silver thread will generate sparks in the microwave oven and is not suitable for use.

3. Plastic lunch boxes: various lunch boxes made of polypropylene, polypropylene resin, composite polypropylene, polysulfone and other materials can withstand the high temperature above 120 degrees Celsius and can be used for microwave heating.

Hope to adopt.