I am so confused. Isn't that the coca cola model? Each area has some coca cola bottling franchise that services them, and they already have regional differences.

Or aluminum

Not to mention that glass also comes from abundant resources like sand and we don't risk running out of it anytime soon

Is now a bad time to point out that not only is sand not as an abundant resource as you think, but we're actually running short of it?

https://www.popularmechanics.com/science/environment/a39880899/earth-is-running-out-of-sand/

https://theweek.com/news/science-health/960931/why-is-the-world-running-out-of-sand

Those glass bottles used to cause an awful lot of horrific deaths and injuries during handling, so from a safety perspective, there is no desire at all to return to glass. Glass bottles are also much heavier than plastic, so have a commensurate environmental impact due to the increased consumption of fossil fuels for shipping as well. Fixing the problems with plastic was a big PR win and saved companies millions in law suits and shipping costs. They won't go back to glass. The answer is probably re-usable plastic containers purchased by the customer and refilled at stores for the same price (or more) than when sold in disposable plastic packaging. Another PR win in the offing, no doubt.

IIRC, plastic is byproduct of oil being refined into gas. As long as there are gas vehicles and engines in general, we ain't gonna get rid of plastic. It's so cheap because is has to be produced.

Better but not 100%. Glass is the only item 100%. Paper is next.