A flat foldable tray having a set of fold lines inscribed therein along which the tray is bent to form a package in which to carry a variety of products (e.g., baked goods). The flat foldable tray includes a base portion, a pair of side walls and a pair of end walls, each of which walls being hingedly connected to the base portion, and a folding corner located between each pair of adjacent side and end walls. The pairs of side and end walls are bent upwardly relative to the base portion along with the folding corners at respective fold lines such that the folding corners are located at the exterior of the package and outside the walls thereof. The pairs of side and end walls are retained in locking engagement with one another so that the walls are retained in end-to-end alignment and the package is held in a closed configuration.