A collapsible container assembly comprising: a folding container having four walls (16a, 16b, 16c, 16d), each wall pivotable relative to the adjacent walls at a corresponding corner, the folding container movable between a collapsed position wherein at least two of the four walls (16a, 16b, 16c, 16d) are disposed adjacent to one another in parallel and an extended position wherein each of the four walls (16a, 16b, 16c, 16d) are perpendicularly arranged relative to each other; and an inside cellular structure attached to at least a portion of each of the four walls (16a, 16b, 16c, 16d), the inside cellular structure comprising a plurality of panels forming a cell assembly, the cell assembly further comprising a plurality of cells (130, 192, 198, 202) in both an X and Y direction with respect to the inside cellular structure, including a corner cell (192, 198) located at each of the four corners of the inside cellular structure, each cell (130, 192, 198, 202) having four cell walls formed by the plurality of panels, at least some of the plurality of cells (130, 192, 198, 202) having two connecting cell walls formed by one of the plurality of panels and another two connecting cell walls formed by an adjacent one of the plurality of panels, each of the connecting cell walls having a curved attachment zone mechanically attached to an attachment zone of an adjacent one of the plurality of panels when the folding container is positioned in the extended position, and two cell walls of each of the four corner cells being attached to two of the four walls (16a, 16b, 16c, 16d) of the folding container in both the collapsed position and the extended position, characterised in that the inside cellular structure (14, 114) defines a set of four outer perimeter panels (132A, 132B, 132C, 132D), and a set of crossing interior panels, wherein each of the interior panels has a first total length and wherein each of the outer perimeter panels has a second total length less than the first total length by a reduced dimension corresponding to an aggregate size of the attachment zones. a folding container having four walls (16a, 16b, 16c, 16d), each wall pivotable relative to the adjacent walls at a corresponding corner, the folding container movable between a collapsed position wherein at least two of the four walls (16a, 16b, 16c, 16d) are disposed adjacent to one another in parallel and an extended position wherein each of the four walls (16a, 16b, 16c, 16d) are perpendicularly arranged relative to each other; and an inside cellular structure attached to at least a portion of each of the four walls (16a, 16b, 16c, 16d), the inside cellular structure comprising a plurality of panels forming a cell assembly, the cell assembly further comprising a plurality of cells (130, 192, 198, 202) in both an X and Y direction with respect to the inside cellular structure, including a corner cell (192, 198) located at each of the four corners of the inside cellular structure, each cell (130, 192, 198, 202) having four cell walls formed by the plurality of panels, at least some of the plurality of cells (130, 192, 198, 202) having two connecting cell walls formed by one of the plurality of panels and another two connecting cell walls formed by an adjacent one of the plurality of panels, each of the connecting cell walls having a curved attachment zone mechanically attached to an attachment zone of an adjacent one of the plurality of panels when the folding container is positioned in the extended position, and two cell walls of each of the four corner cells being attached to two of the four walls (16a, 16b, 16c, 16d) of the folding container in both the collapsed position and the extended position, characterised in that the inside cellular structure (14, 114) defines a set of four outer perimeter panels (132A, 132B, 132C, 132D), and a set of crossing interior panels, wherein each of the interior panels has a first total length and wherein each of the outer perimeter panels has a second total length less than the first total length by a reduced dimension corresponding to an aggregate size of the attachment zones.