Check the bottom of your reusable glass milk bottle… If it says StanPac, chances are it is painted with high-Lead paint.
Evenflo glass bottle with white painted markings: 11 ppm Cadmium in the glass (safe by all standards)
Medela glass baby bottle/breast milk storage: 25 ppm Cadmium + 68 ppm Lead + 86 ppm Antimony. Safe by all standards.
XRF test results for Parent’s Choice glass bottle with gray markings: 17 ppm Lead & 9 ppm Cadmium (safe by all standards)
Philips Avent Natural Glass Baby Bottle: Lead-free, 21 ppm Cadmium in the silicone nipple (Cadmium is a known carcinogen, but this is considered safe by all current standards)