Well, Coca-Cola is interesting. They used to use returnable bottles, which are better than cans and plastic bottles. Cans require resource extraction for the metals, and they contain plastic as well.
The better option is to have returnable glass bottles, which we used to have back in the old days. I'm that old. There was a consortium of beverage companies that got together and launched a huge re-education campaign to force through—against major public backlash and protest in the United States, in particular—plastic bottles, because they could get more profit. They're lighter, so the transportation costs from fuel are less.