a fabricated cup or other container in which the sidewall is formed from a rectangular sheet - like blank of an oriented thermoplastic material , the blank having its ends joined to one another to form a cylindrical sleeve with a liquid - tight seam , the blank having a relatively high degree of orientation extending circumferentially of the sleeve , the fabrication of the sidewall from the sleeve being accomplished by telescoping the sleeve over a substantially cylindrical mandrel , by exposing the sleeve to heat to cause it to shrink into conformity with the external configuration of the mandrel and by completing the cup by pressing the bottom and forming a beaded rim . the apparatus for fabricating the container includes a mandrel carrying drum that revolves through a series of work stations that insert a sleeve of thermoplastic material on the mandrel , subjects it to softening heat which permits the sleeve to conform to the mandrel and protrude in part therefrom , presses the protruding material of the sleeve into a container bottom while substantially simultaneously forming a bead - like rim on the container and ejecting the completed container from the mandrel .