An elongate, rectangular box (12, 14, 40, 60, 70, 90, 100) and method for packaging containers (C), wherein the box can be cross-stacked for stable stacking of the boxes, and optimizes utilization of pallet space. Containers (C) are placed in the box in nested, offset relationship in a parallelogram shaped arrangement, and in one embodiment interior corner panels (20, 21) extend angularly across two diagonally opposite corners of the box, defining an interior box shape closely conforming to the parallelogram-shaped arrangement of the containers. The corner panels may be cut from the side walls (18, 19) and folded inwardly and secured at a free edge (28) to an adjacent end wall (16, 17), defining openings (22, 23) in the side wall through which the containers are visible. Side wall segments (24, 25, 26) at the bottom and sides of the opening, in cooperation with the corner panels, retain the containers in place in the box. The box is especially suited for packaging four one-gallon containers.