This square box with triangular inserts was the first of Black and Blum's lunch box designs. The glass-like lid clips to the body and forms a watertight closure with the silicone seal. The included 'fife', a fork and knife combined, can be slipped into the stowage loop on the outside of the lid. All the materials used in this lunch box are BPA and BPS free. The box can be used with the black+blum Lunch Box Bag (AIBDC : 007780).