It's no secret that red Fiestaware produced between 1936 and 1943 contains uranium. While the amount contained in these iconic dishes won't kill you to be around, the EPA warns that eating acidic foods off them on a daily basis would contribute significantlyto your overall exposure of radiation.

Is uranium glass harmful to humans?

Uranium glass also fluoresces bright green under ultraviolet light and can register above background radiation on a sufficiently sensitive Geiger counter, although most pieces of uranium glass are considered to be harmless and only negligibly radioactive.

Is it safe to drink out of uranium glass?

In reference to Uranium glass' radioactivity, it should be noted that, while pieces from the late-19th and early-20th centuries were comprised of 2-25% uranium, the level of radioactivity is still negligible in the long run; people are exposed to radioactive materials every day and, while we wouldn't recommend eating ...