If you love Moscow Mules, you might want to rethink that traditional copper cup. We know, we know, it鈥檚 really cute (and doesn鈥檛 your mule just TASTE better in a copper cup??). But it might actually be poisonous: Iowa鈥檚 Alcoholic Beverages Division issued an advisory stating that copper cups pose a health risk when they come into contact with beverages with a low pH 鈥 and Mule cocktail recipes most certainly do. Here鈥檚 what you need to know.

Copper, along with some other materials, such as aluminum, iron, and non-stainless steel, is considered a 鈥渞eactive鈥 metal. In fact, most chefs know not to cook acidic foods such as tomato sauces in copper pots and pans for exactly this reason.

When copper comes into contact with acidic materials (such as fruit juices, wine, lime, and your mule) the copper transfers into the food or beverage itself. And while a little copper isn鈥檛 a big deal, it is most certainly possible to experience copper poisoning.

While it stands to reason that one drink from a copper mug isn鈥檛 going to kill you, long-term exposure to copper can cause a lot of serious problems, including vomiting, jaundice, low blood pressure, and liver problems.

So what鈥檚 a Moscow Mule lover to do? It鈥檚 simple 鈥 drink your Mule from a good, old-fashioned glass, or at least from a stainless steel mug that鈥檚 been painted copper on the outside. You鈥檒l be able to tell if this is the case because your cup will be silver-toned on the inner rim. Problem solved!

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(Image via Gainesville Grub)