Abstract: A container (10) for the pressure tight packaging of articles, in particular tennis balls, is described which consists of a multiple layer foil (12) which is matched at least substantially to the shape of the articles to be packaged and is closed by welded seams (26, 28, 30). The multiple layer foil embraces at least one layer of a gas impermeable material, and at least one layer of a strength giving material with at least the layer which forms the interior surface of the container being weldable. At least one part of the weld seams is formed without overlapping by welding together the interior surfaces of the container. The non-overlapped weld seams are folded-back onto the body of the container and secured to the body of the container by a tape (32) or by an adhesive strip (FIG. 4).