[danuker]

Amazing! Thanks for the well-researched info. I did not know aluminum cans were lined. I thought the oxide layer is stable enough.

[bluGill]

The acid in carbonation will eat the oxide layer, so soft drink cans get a thin plastic lining. Alcohol cans often are not lined.

[moffkalast]

I think they just spray them with a thin layer of epoxy, otherwise certain drinks get a metallic taste?