Those Russians are at it again by trying to give us copper poisoning. That’s right, copper mugs, like those often used to serve a Moscow Mule, and acidic drinks can be hazardous to your health. In fact, according to Tasting Table, Iowa in 2017 issued an advisory against serving Moscow Mules in copper containers. That said, “most people would need to down 30 mules in a day to reach dangerous levels. To stay on the safe side, opt for a glass. But if you really love the look of copper, you can find cups lined with nickel or stainless steel.”
– Jet Cannon