Collapsible casket with reduced shipping and/or storage footprint

A folded blank includes a bottom panel, side panels, and end panels. The bottom panel has opposite side edges and opposite end edges defining a length and width sized to support a deceased human body in the supine position. The side panels are connected to the opposite side edges of the bottom panel, and extend outward from and substantially parallel to the bottom panel. The end panels are foldably connected to the opposite end edges of the bottom panel, and are folded to extend inward from the corresponding opposite end edges. The folded blank also includes at least one gusset foldably connected to a side panel along a first fold line and connected to an end panel along a second fold line. The gusset has a diagonal fold, and has a first surface disposed adjacent to and coupled to the side panel in an additional location away from the first fold line.