Really Useful Boxes are strong, stackable and a real solution to storage problems at home or at the office. Keep things neat and tidy with these compact boxes which allow you to store things with only a limited amount of space. These boxes fit together snuggly and can be stacked with ease. Made of strong polypropylene, this Really Useful Box is water-resistant and useful for archiving, filing and storage. Strong, stackable, storage box, complete with lockable lid