I am from Austria, and here you can buy water in cans. It's not common, but lately, there are 2-3 brands that offer canned water, which you can find in a normal supermarket.

On the other hand, I've never seen water in cartons in my life.

But both cans and cartons are also lined with plastic on the inside, afaik.

I was seeing "When Chinese Industrial Espionage Goes Wrong" [1] some months age, industrial espionage related to the inside coatings of the cans. Quite interesting video.

1: https://www.youtube.com/watch?v=y8ojlJoM0FE