Wine tumblers and glasses made from copper are popular because copper is an excellent conductor of heat, meaning that it can help keep beverages at a consistent temperature. Additionally, the metal is quite durable and has a unique aesthetic appeal. However, it’s important to note that copper is not an ideal material for holding acidic liquids like wine, as it can react with the acid and potentially leach harmful compounds into the drink.
To mitigate this issue, many copper wine tumblers are lined with other materials like stainless steel or nickel, which provide a protective barrier between the copper and the wine. It’s also important to choose high-quality, food-safe copper tumblers from reputable manufacturers to ensure that they are free from any harmful contaminants.