A box is formed from a sheet of corrugated material defining a plurality of channels parallel to each other. The box comprises a lid with a pair of inner lid flaps and a pair of outer lid flaps, where at least one of the pairs of lid flaps are engageable with each other; a bottom with a pair of inner bottom flaps and a pair of outer bottom flaps, where at least one of the pairs of bottom flaps are engageable with each other; and four side walls, wherein the channels of the corrugated material in the four side walls are vertical or inclined in a use position of the box. The design permits the box to have a high compressive strength on all sides.