Worried about whether your loved one is eating healthy food outside the home? Think about their health and buy this 4-layer thermal lunch box made of food-grade stainless material today. The lunch box contains 4 containers of different sizes suitable for the amount of food, which will ensure the right capacity. Let your family stay healthy with your love-infused cooking. Product Name: Tedemei Lunch Box. Material: Stainless Steel and Plastic. Heat Retention: 6 to 8 hours. Origin: China.