Why should copper containers not be used?

Copper containers should not be used to hold acidic liquids because copper can react with the acidity of these liquids, leading to the leaching of copper into the food or drink. This reaction can result in the formation of copper salts, which pose health risks when ingested. Consuming copper can lead to toxicity, resulting in symptoms such as gastrointestinal distress, headaches, and even more serious effects with prolonged exposure. Therefore, food safety practices recommend using alternative materials that are non-reactive, such as stainless steel or glass, for storing or serving acidic substances.

The other options do not involve the same health risks associated with the use of copper containers for acidic liquids. Using copper for things like bread bowls, displaying whole oranges, or as pitchers for water does not typically pose the same chemical reactions that could result in harmful health effects. However, it's ideal to stick to safer materials for all food and drink storage to maintain food safety and quality.