The personalized lunch box is portable flatware, perfect for everyday use in the office or school, as well as for anywhere outdoors. This stacking lunch box has 2 layers, you can freely combine them into single or dual layers as needed, it is convenient to carry and easy to lock as well as to unlock. The U-shaped clips on both sides of the lunch box are tight and durable. The lid of lunch box has a heavy-duty silicone seal 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 silicone hole could be lifted up to release the pressure and make it easy to open. Interior is made from high quality 100% 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.