The invention is directed to a box, namely a pizza box having a bottom wall; a peripheral side wall attached to a periphery of the bottom wall; a top cover including a rear edge hingedly attached to the side wall, a front edge, and two side edges between the front edge and the rear edge. The box is fitted with a serving tray having handles on at least two opposing sides. The serving tray is designed to fit inside the pizza box. The box may contain at least two slits in the top cover, each slit extending along the front edge, side edge or back edge. These slits are configured so that the handles from the serving tray partially fit into each slit thereby providing additional support for the overall structure of the pizza box. This allows the pizza box to be constructed of lighter material with the additional support coming from the handles of the serving tray.