Colorless with yellowish cast, non-lead Pyrex borosilicate glass; pressed. (a) Deep circular basin with walls tapering in towards base, inset flange on inside of flared rim, exterior of rim has a minute extruded edge, walls curve to wide flattened base molded with inset circular foot in very slight relief; overall mold marks; (b) slightly domed lid with center extended to form tall flared conical handle topped with solid button-shaped knob with nipple, remainder of handle is hollow with lower half stepped out and curving into lid top, vertical two-part mold marks on handle, perimeter of lid is flattened on top and bottom to fit in basin flange, underside of rim is in slightly raised; exterior of rim has a minute extruded edge; overall mold and chill marks; (a) molded in low relief circle at center of base (reading through interior): interlocked CG monogram/PYREX/interlocked CG monogram; (b) molded in low relief on top rim of lid on opposite sides of PYREX is the item number: "PYREX/101".