Are you a fan of the Moscow Mule drink? You may want to reconsider the mug that your drink is served in. The Moscow Mule is a drink that contains vodka, ginger beer, lime and ice and served up in a copper mug. According to the FDA guidelines, copper should not come into contact with acidic foods with a pH below six. That includes vinegar, fruit juice and wine. A traditional Moscow mule pH is well below 6.0. When copper or copper alloy surfaces contact acidic foods, the copper can possibly be leached into the food or drinks. Food and Drug Administration’s code prohibits copper from coming into direct contact with acidic foods with a pH below 6.0, including Moscow Mules.
Symptoms of copper poisoning include abdominal pain, diarrhea, vomiting and jaundice. Long term exposure can cause liver failure and death.
A simple fix to avoid possible health issues, is to have Moscow mules served in copper mugs lined on the inside with another metal, like nickel or stainless steel.
Source: Twin Cities Pioneer Press