PYREX #501 B 1-1/2 cup refrigerator container in yellow #32. Clear glass cover #501-C. In prestine condition. There is a makers design mark on the shorter side (see picture). No sign of chips or other marks. PYREX #501 B 1-1/2 cup refrigerator container in yellow #36. Clear glass cover #501-C. In prestine condition. There is a mark on the shorter side (see picture). No sign of chips or other marks.