Do Aluminium Cans Have a Plastic Lining?

The world produces a staggering 180 billion aluminium cans every year, but it's a safe bet many of the people consuming those beverages don't know about a hidden material concealed inside the metal cylinders. For decades, aluminium can manufacturers have lined the inside of their cans with plastic.

What are Aluminium cans lined with?

The inside of the can is lined by spray coating an epoxy lacquer or polymer to protect the aluminum from being corroded by acidic contents such as carbonated beverages and imparting a metallic taste to the beverage. The epoxy may contain bisphenol A.

Do cans have a plastic lining?

To prevent any accidents, a protective coating is added to the inside of the soda can. Typically a polymer plastic lining, this coating shields the aluminium from the soda and prevents them from reacting together. Most fizzy drinks contain phosphoric acid and citric acid, giving them an average pH of 2.5.

Sarah Jenkins

Sarah Jenkins

Senior Technology Editor & AI Specialist

Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.