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Looking it up now, it looks like there are multiple alternative linings which are being phased in and/or proposed, but every can still has some sort of lining, whether an epoxy or other similar material to protect the contents of the can from the aluminum or vice versa.
EDIT: whether or not this lining outweighs the additional transport and processing costs of glass (remelting/shaping glass is much more energy intensive than aluminum reporcessing as I understand it) was the question I was proposing and one I don’t have an answer for.
What I was referring to was the BPA lining traditionally found in cans: https://www.beeradvocate.com/articles/15869/bisphenol-pale-ale-should-you-be-worried-about-the-bpa-in-your-beer-can/
Looking it up now, it looks like there are multiple alternative linings which are being phased in and/or proposed, but every can still has some sort of lining, whether an epoxy or other similar material to protect the contents of the can from the aluminum or vice versa.
EDIT: whether or not this lining outweighs the additional transport and processing costs of glass (remelting/shaping glass is much more energy intensive than aluminum reporcessing as I understand it) was the question I was proposing and one I don’t have an answer for.