Please stop using vintage Pyrex glassware for cooking & serving food – it’s often painted with high-Lead paint & can test positive for Cadmium & Arsenic, too.
“If the Lead is only on the OUTSIDE (… of my dish, measuring cup, mixing bowl, etc….) why does it matter?”
Red Vintage Pyrex Food Storage Container with Lid: 310,000 ppm Lead + 14,200 ppm Arsenic + 33,200 ppm Cadmium