[Permanent insulation and heat protection] - stainless steel inside, PP material outside. Picnic excursion lunch boxes are resistant to insulation and heat [Quality Material] - The lunch box is made of high quality stainless steel material, which is high strength, rustproof and durable. [Wide range of applications] - Lunch box Lunch box ideal replacement for cold delicacies, cooked food, soup and much more [Wide range of applications] - Lunch box Lunch box ideal replacement for cold delicacies, cooked food, soup and much more [Wide range of applications] - Lunch box Lunch box ideal replacement for cold delicacies, cooked food, soup and much more [Wide range of applications] - Lunch box Lunch box ideal replacement for cold delicacies, cooked food, soup and much more [Wide range of applications] - Lunch box Lunch box ideal replacement for cold delicacies, cooked food, soup and much more [Wide range of applications] - Lunch box Lunch box ideal replacement for cold delicacies, cooked food, soup and much more [Portable] - Stainless steel bento box food container with double handles, easy to carry [Good insulation effect] - The adopted ring of the stainless steel food container increases the sealing effect. Insulation persistent and thermal protection.