Abstract: A method and apparatus for forming a self-supporting tray-like container wherein a product-receiving well protrudes into a second well in an all-round mutually spaced relationship. The method calls for two parts, each formed with a well therein and each part formed of a thermoplastic having a different resistance to thermal deformation, to be joined at their peripheries. The present invention additionally provides that the two parts are to be formed simultaneously, their peripheries are to be joined so that their respective wells extend in opposite directions after which one well is inverted into the other.