Why no one mentions Klean Kanteen. Just get a big one just stainless steel without any coating and a wide opening. Lid only needs one small rubber and closes perfectly. Maybe one of my best investments ever.

But remember water at the airport is quite expensive. So if the airport has refill stations get a small bottle and refill. Also when you board just directly take of your shoes. And bring some warmer clothes if you easily feel cold.

That stuff even happens with UK companies taking over German companies. They think they can just fire the members of the working council, very bad mistake! Remember, if you go to another country, you have to adjust to their law.