A single piece container made from cardboard, paperboard or other lightweight foldable sheet material, the container comprising: an outer shell having a first end and a second end, and comprising a plurality of side wall panels (60, 62, 64, 66) hingedly connected to one other about respective outer shell sidewall foldlines (68, 70, 72) and extending between the first end and the second end of the outer shell, wherein at least the second end of the outer shell is a closed end; and an inner shell, wherein the inner shell comprises a first end, an opposite second end, and a plurality of side walls (7, 9, 11, 13) hingedly connected to one another about respective inner shell sidewall foldlines (15, 17, 19) and extending between the first end and the second end of the inner shell, wherein the inner shell is integrally connected to the outer shell along a foldline; and at least one spacer tab (39, 41) connecting the inner shell and the outer shell, the spacer tab (39, 41) being cut from a respective side wall panel (9, 13) of the inner shell; wherein one of the side wall panels of the inner shell is integrally connected to the outer shell along said foldline, wherein the side wall panel of the inner shell which is integrally connected to the outer shell along the foldline comprises a connecting portion which connects the inner shell to the outer shell, wherein the connecting portion extends from an edge of an adjacent side wall panel of the inner shell at a proximal end of the connecting portion, and is connected to the outer shell along the foldline at a distal end of the connecting portion; wherein the inner shell comprises an inner shell glue flap connected along a fold line to one of the side wall panels of the inner shell, which inner shell glue flap is attached to the connecting portion of the side wall panel of the inner shell to retain the inner shell in an erect configuration; characterised in that a tab is cut from the side wall panel of the inner shell to which the inner shell glue flap is connected along the foldline, the tab having a base which extends from a proximal edge of the inner shell glue flap, and wherein the tab is attached to the interior of the inner shell side wall panel having the connecting portion to which the inner shell glue flap is attached, wherein the base of the tab interrupts the foldline connecting the inner shell glue flap to the side wall panel to which the inner shell glue flap is connected. an outer shell having a first end and a second end, and comprising a plurality of side wall panels (60, 62, 64, 66) hingedly connected to one other about respective outer shell sidewall foldlines (68, 70, 72) and extending between the first end and the second end of the outer shell, wherein at least the second end of the outer shell is a closed end; and an inner shell, wherein the inner shell comprises a first end, an opposite second end, and a plurality of side walls (7, 9, 11, 13) hingedly connected to one another about respective inner shell sidewall foldlines (15, 17, 19) and extending between the first end and the second end of the inner shell, wherein the inner shell is integrally connected to the outer shell along a foldline; and at least one spacer tab (39, 41) connecting the inner shell and the outer shell, the spacer tab (39, 41) being cut from a respective side wall panel (9, 13) of the inner shell; wherein one of the side wall panels of the inner shell is integrally connected to the outer shell along said foldline, wherein the side wall panel of the inner shell which is integrally connected to the outer shell along the foldline comprises a connecting portion which connects the inner shell to the outer shell, wherein the connecting portion extends from an edge of an adjacent side wall panel of the inner shell at a proximal end of the connecting portion, and is connected to the outer shell along the foldline at a distal end of the connecting portion; wherein the inner shell comprises an inner shell glue flap connected along a fold line to one of the side wall panels of the inner shell, which inner shell glue flap is attached to the connecting portion of the side wall panel of the inner shell to retain the inner shell in an erect configuration; characterised in that a tab is cut from the side wall panel of the inner shell to which the inner shell glue flap is connected along the foldline, the tab having a base which extends from a proximal edge of the inner shell glue flap, and wherein the tab is attached to the interior of the inner shell side wall panel having the connecting portion to which the inner shell glue flap is attached, wherein the base of the tab interrupts the foldline connecting the inner shell glue flap to the side wall panel to which the inner shell glue flap is connected.