1960s Sango brand (made in Japan) child’s teacup: 2,323 ppm Lead [90 is unsafe for kids] + 292 ppm Arsenic.
This is the clear borosilicate glass tea pot I use in my home. Yes, it is Lead-free and stovetop safe!
One of my most disappointing finds recently: purple 2019 ForLife Q Tea Cup w Handle “lead-free” mug: 541 ppm Lead
Johnson Brothers English Greydawn Teacup & Saucer: 37,400+ ppm Lead [90 ppm Lead is unsafe for kids.]
Vintage Queen Anne “Country Gardens” Pattern Bone China Teacup: 81,300 ppm Lead [90 ppm is unsafe for kids.]
“Old Town Blue” Pattern Vintage Pyrex Tea Cup, c.1972 – 1982: 17,700 ppm Lead [90 ppm is unsafe for kids.]