Material:This hamburger lunch box is made of PP plastic. Box Size: Our lunch boxes are available in round lunch box and rectangular lunch box sizes. A round lunch box is approximately 14 x 9 cm (5.51 in x 3.54 in)- With Forks and spoons;rectangular lunch box is approximately 16 x 10 x 9 cm (6.30 in x 3.94 in x 3.54 in) with spoons. Design:A cute and fun burger shape that you can put in fruit, sandwiches or some small snacks, it looks appetizing, comes with a small spoon or can be used with a knife and fork. three layers:the upper layer is two lower layers, which can be used to hold small snacks, such as cookies, and the lower layer can be used for sandwiches or some soups or cooked food. Tips:It can be heated to below 120 degrees in a microwave oven, refrigerated at minus 20 degrees, and you can wash it in a dishwasher.