Huswell Tiffin Lunch Box, 3 Layer, Stainless Steel, Blue Portable bento box made from food grade metal for BPA and plasticiser free healthy eating on the go Leakproof seal on the top tray (only) operated by strong clips so there's no worry about spilling anything Insulated by the outer plastic to keep food warm or cold for longer 6 by 8 inches high. 22 oz. (660 ml) per tray. Can be used as a full stack or just one or two trays Note many customers dishwash these but water can become trapped between plastic and metal parts