Premium Material - The interior is made of high quality food grade SS304 stainless steel that will never rust and is naturally BPA free. It does not retain flavors or smells, so it can be used many times. The outer part and partitions are made of food-safe plastic. Versatile Design - Can be used for hot food like soup, fried rice etc which will be kept warm for 2-4 hours or cold food like salad, pasta, fruit etc. You can use 1 layer, 2 layers or all 3 layers for different food combinations. Leak and Spill Resistant - There are heavy-duty silicone gaskets between each stackable insulated compartment to block out freshness, leaks and odors. Please note that the joint between the layers is tight to prevent leaks and spills. It will become smooth after using it a few times. Color specification: green, pink, blue The default main color of the picture is provided, and you need to note if you want Additional color comments are required