Sodas around the World

I had a wonderful conversation with a writer today about how different sodas taste around the world. I had never noticed this. Does a Diet Coke in the US taste better than a Diet Coke in Japan? I can certainly vouch for the differences between drinking a Coke from a bottle and drinking a Coke from a can. Bottles rule! Especially the old-fashioned green ones. When you travel around the world, you find ones that are quite scratched... which begs the question, "How long have they been around?"