But is it dangerous?
No. Almost assuredly, no.
Jack Caravanos, a professor of public health at New York University who studies lead, tested three Stanley cup models of different sizes on Monday using an X-ray fluorescence detector, which determines the elements of a material.
“There’s a lot of places where lead can be on a cup like that,” Dr. Caravanos said. “It could be on the inside, the outside, the labels, decals. And, I did not find lead — sort of superficial lead on the surface — in any part of the cup.”
“I’m a global exposure expert,” he added. “I’ve done a lot of work in different products and countries. And the threat to human health is really negligible because you’re not going to really put your mouth anywhere near that surface, and it’s not going to readily dissolve into anything that can get into you.”
But what about the area underneath the stainless steel?
For that, Dr. Caravanos said he would have to deconstruct the cup itself — by no means an easy task.
“I tried repeatedly to pry open the bottom cap with various tools and failed,” he said. “Perhaps the lead is being used to seal the cap closed. In any case, it should further assure the public that lead material is very unlikely to ever be released from the cup and be made available for ingestion.”
Dr. Caravanos said that at home lead tests on the market today are not considered reliable — and none of them available today are approved by the Environmental Protection Agency. Though on Tuesday morning, Dr. Caravanos tried an at home test on a bottle and still did not get a positive test.