I bought an electric lunch box the other day and want to try it. I tried several times and didn't like it. It's been hot for a long time and I don't feel very good. Besides, it is not convenient to carry food. The previous Coron plastic lunch box was double-layered, and both single-layer and double-layer can be used. The structural design of the strap is also very scientific and convenient. In short, the electric lunch box is inconvenient.