Abstract: An article can include a panel member folded to form a collapsible sleeve comprising a first panel layer and a second panel layer, the panel member movable between a first configuration and a second configuration, the first and second panel layers defining a product-receiving portion. Each of the first panel layer and the second panel layer can comprise a pivotable edge portion and an extension portion coupled to the pivotable edge portion and received in an opening defined in a respective first and second panel layer. The edge portions of the first panel layer and the second panel layer are pivotable together to form a double-layered support member extending at an angle to the product-receiving portion on a first side of the product-receiving portion and the extension portions are pivotable out of their respective openings on an opposite, second side of the product-receiving portion by motion of the pivotable edge portions.