Stop using your vintage Tupperware NOW. These measuring cups are positive for 2,103 ppm Lead + 250 ppm Arsenic.
Pyrex® Glass Measuring Cup (c. 1994): 6,253 ppm Lead in the red outside markings. [90 ppm is unsafe for kids]
Pyrex Glass Measuring Cup: Positive for 326 ppm Cadmium in the Red Exterior Writing. 75 ppm is illegal in Denmark.
Purple Pyrex glass measuring cup: 20,700 ppm Lead (90 is unsafe*) +175 ppm Cadmium. Yum! What are you baking with?
Anchor Hocking Measuring Cup: 36,300 ppm Lead + 580 Cadmium. Are the markings on YOUR measuring cup worn?
White Tupperware Vintage Measuring Cups: Non-detect for Lead, Mercury, Cadmium and Arsenic. [But these have BPA!]