Colorless non-lead glass; borosilicate (Pyrex®); pressed; a) hemispherical shaped dish; machine finished rim; two handles, one opposite the other, ends of handles curved with squared off corners, sides of handles raised, "PYREX®/de CORNING" molded into the underside of one handle, "454 FRANCE Y" molded into underside of other; body of dish tapered in to bottom, bottom rounded in to base; flat circular base; b) circular cover; domed with flat top; sides of dome tapered out; two handles, one opposite the other; ends of handles curved with squared off corners, sides of handles bent down, "PYREX®/de CORNING" molded into top of one handle, "454 FRANCE Z" molded into top of other; rim machine finished, rim underside has raised inner edge.