Big soft drink companies have bottling plants all over. Coke isn't made in Atlanta Georgia and shipped to Des Moines IA: it is made in Atlantic IA and Shipped to Des Moints. I don't know where else Coke has plants, but I would guess nearly every country in the world - with many having more than one. Coke delivers to the local store and goes back empty for more so this would work well if they would go back to glass bottles.

It isn't that simple though, I have relatives that worked for coke back in the glass bottle days and they would never drink coke from a glass bottle - they knew first hand how hard it was to get those bottles clean again. New plastic bottles and cans are always clean.

Soft drinks are usually bottled/canned fairly close to the consumers. For example, Coca Cola has six manufacturing sites in the UK [1].

Sometimes the concentrated syrup will be transported to the bottling company; I think this is probably the usual case for smaller markets.

[1] https://www.coca-cola.co.uk/about-us/our-business

Tons of Developing and Undeveloped countries I've spent time in have reuseable glass coke bottles.....

It can be done