【Safe & Healthy】The interior is made from high quality food-grade stainless steel, BPA-free, never rust, does not retain flavors or scents; The exterior and dividers are made from food-grade safe plastic, non-toxic and odorless; so you could use it with confidence【Unique & Multifunctional】The plastic layer in the main container is microwaveable, you could use it to reheat the food or just to hold the food; it could be removed so the main container can be used alone to hold a larger content, depend on your preference and the food you are going to take【Leak & Spill Proof】The lid of lunch box has a heavy-duty silicone seals to prevent leak and spill, you could put the hot soup in the first layer; it is very tight to lock in freshness, leaks and odors, but the plastic valve could be lifted up to release the pressure and make it easy to open【Stackable & Flexible】2 layers but 3 compartments, you could stack them up or down, and combine them flexibly into single or double layers as needed【Insulated Bag Included】Made of denim fabric exterior and aluminum foil interior, it can not only enhance the insulation, but also make it easier to be carried around