Abstract: The disclosure describes a method of manufacturing a display package (4) involving attaching thermoplastically coated cardboard sheets (5,6) together by fusing regions of the thermoplastic coating (8,9) together by high frequency welding. A container incorporating a mounting flange is also fused to the thermoplastic layers (8,9) by high frequency welding. There is no distinct adhesive between the polyethylene coated cardboard backing sheets.