Lid/tray and base each have separate access. Comfortably fits on top of Super Satchel Cube. Each has 2 side bins with both fixed and removable dividers. Top tray of box has removable dividers. Base is one compartment. All boxes in the Super Satchel Series are molded in acid free polypropylene. All "Standard Depth", "Slim" and "Double Deep" models are stackable.