Lookatool&reg; Single Stainless Steel Insulation Lunch Bento Box Food Container Bag 100% brand new and high quality. Material: Stainless steel. Size:19CcmX13.5cmX7.5cm. It is made of food-grade materials and high quality stainless steel.Non-toxic,testeless,health and safety. Arched handle,more convenient to carry. Easy Clean,Practical,Low-Maintenance and Eco-friendly. It can keep the food warm 3-4 hours(But affected by your local Season,Weather and Temperature, the exact time may not reach this keep warm time) Air hole's design let you open the box more easy. The lid with extended fastening design,close the lid and box body fastening,no leaking no sprinkle,easy to carry. Gasket ring's design let box have a nice tightness.