a container for receiving frangible items comprising a sheet of polymer formed into : a base portion and at least one cover portion with a hinge between the base portion and the cover portion . abutment spacer are formed at an edge between the peripheral walls and the top wall and each comprise an abutment surface projecting into the concavity from one of the peripheral walls , and support walls relating the abutment surface to the top wall , with at least one of the support walls being in an acute angle relation with the top wall of the cover portion . alignment channels are in at least one of the peripheral walls defining an alignment protrusion through the sheet of polymer , the alignment channel / protrusion being oriented vertically for guiding the nesting of an upper one of the cover portion descending into a lower one of the cover portion .