A method of processing boxes includes shuttling a box in a first direction and cutting to separate outer flaps of the box from one another as the box moves past a cutting tool in the first direction, wherein the outer flaps overlie inner flaps. The method includes engaging a set of opening guides with the outer flaps of the box to drive the outer flaps open. The method includes opening inner flaps using shape memory and shuttling the box in the first direction over an inclined plane after the inner and outer flaps are open to flatten the box.

A box includes a plurality of side panels formed around an interior space. A pair of opposed outer flaps is foldably connected to two of the respective side panels, wherein the outer flaps are secured in a closed position to enclose one side of the box. A pair of opposed inner flaps are included, wherein the outer flaps overlie the inner flaps. A first one of the side panels of the box includes a pair of guide holes each configured to receive a respective opening guide for opening the outer flaps.