Our donut tray can be used as a 2-piece box or 1-piece tray! If used as a box, the telescoping top slides down onto the box and fully overlaps it to help secure its contents. Speaking of contents, you can use this tray for more than just donuts. It could be used for any type of pastry, wrapped sandwiches, wrapped tacos, or even to display a variety of snacks. The lock corners facilitate assembly and enable the tray to be folded flat for storage or transport.