Yes Supor insulated lunch box is a food container made of double-layer plastic or stainless steel with vacuum layer or insulation layer. The top is covered and sealed tightly. The vacuum layer or insulation layer can delay the heat dissipation of the food inside. Indeed, the heat preservation 12 hour was achieved. Supor is the first listed company in China cookware industry. Supor has three business areas: open-flame cookers, small kitchen appliances and kitchen appliances, and its rich product line fully meets the needs of kitchen life.