A reel or spool package has opposing sidewalls or flanges formed of the specified or appropriate substrate and connected by a core formed of a flowable material which sets or cures to harden, such as a two part expandable polyurethane foam. The apparatus includes at least one sensor, at least one controller and at least one gas permeable membrane being adapted to facilitate the passage there through of different molecules at different rates. The corresponding intermediate element is made by being overmolded around the rear portion. The -hydroxy carbamate monomer can be used as a replacement monomer for acrylamide. This results in identification of factors which engender loyalty from a customer perspective.