Bad news for Moscow Mule drinkers, especially if you’re attracted to the classic copper mugs they’re typically served in. It turns out the three main ingredients, vodka, ginger beer and fresh lime juice are each acidic enough to leach copper into the cocktail.
Copper occurs naturally in many common foods. Consuming small amounts is considered healthy. According to the Center for Disease Control, the average person eats about one milligram of the element each day.
But, excessive or long term consumption of copper can cause health concerns. Symptoms of copper poisoning include diarrhea, nausea, dizziness and headaches. Exposure can also cause irritation of the eyes, nose and mouth.
There is a silver lining.
The solution is simple, readily available and cheap. Whether you shop online or brick and mortar, it’s as easy to find a mule mug lined with silver-colored metal as it is to find one made only of copper. The safer mugs are typically lined with nickel or stainless steel. And, they are often cheaper than the solid copper versions.