Dissolving?

Dissolving?
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Why doesn't Coke and Pepsi dissolve the cans?

Q: In your book The Straight Dope you state that Coca-Cola will
dissolve aluminum. My question is this: How is it that this
beverage is sold in aluminum cans without oxidizing them?

Cecil replies:
According to Coke, the cans are "coated with a very thin layer
of a type of light, food grade plastic material approved by the
FDA." This prevents the highly corrosive contents from dissolving
the containers. The unanswered question is, what keeps them from
dissolving you?

~Cecil Adams, from The Straight Dope~