1, better heat preservation effect: the heat preservation lunch box adopts double-layer stainless steel structure and vacuum heat preservation technology, which can effectively isolate the outside temperature and keep the food temperature. In contrast, the lunch box is usually just a simple container, which can't provide good insulation effect. The insulated lunch box can keep the hot food warm for several hours, keep the food hot, and let people enjoy the hot food at lunch time.

2, more suitable for long-term preservation: insulated lunch boxes are suitable for long-term preservation of food because of their good thermal insulation performance. During work or study, you should prepare meals in advance. The insulated lunch box can keep the freshness and taste of food, so that people can enjoy delicious meals at any time. The lunch box has no heat preservation function, and the food is easy to cool, so it is not suitable for long-term storage.