What Are Bottle Caps Made Of?

Most bottle caps are made of tin-plated steel. Tin is a metal that resists corrosion, making it an ideal material for packaging food and beverages. Steel is a strong material, making it able to withstand the pressure inside of a bottle.

Aluminum

Aluminum is another common material used to make bottle caps. Aluminum is lightweight and corrosion-resistant, making it a good choice for packaging that needs to be transported over long distances.

Plastic

Plastic is sometimes used to make bottle caps for products like milk and juice. Plastic caps are lightweight and inexpensive, making them a good option for products that are consumed quickly.