A container formed from a foldable blank into a box-like configuration for transport of a tray or container storing food items therein, such as a catering tray. The container includes a bottom portion defined by a bottom wall, front and rear walls, and spaced-apart side walls, all of which project upwardly from bottom wall. A top portion is provided which is swingably movable relative to the bottom portion to provide open and closed configurations of the container. The container provides an added insulative layer so as to maintain food items stored within the catering tray at the desired temperature, and also improves handling thereof.