In an example embodiment, a re-sealable label for covering an opening of a box includes a sheet of polymer material that includes a re-sealable adhesive on an underside thereof. A liner is adhered to the underside of the sheet of polymer material. The liner is configured to cover the opening and includes a foil layer and a paper layer. The sheet of polymer material includes a line of perforations wherein one or more of the perforations of the line of perforations include a rectilinear portion and a non-rectilinear portion.