Packaging is important to any food because it needs to be able to retain the food’s quality, and the shelf life of the product is dependent on it. Soda pop is very acidic and, having at least two types of acids, it needs the polymeric coating that it has or the acids would eat through the can and the results would be disastrous. I believe that the soda does not react to the aluminum because there is a plastic lining protecting the inside of the can.