I love that, especially when the giants are playing and tons of people are having a good time when you are on your way home from work. Also funny when they exit in the city and the police immediately greets them and makes them throw away any leftovers ;)

They are prohibited after a certain hour (10p? idk) and after events, such as sports games.

If you're grabbing one for a commute, it's totally fine though!

I dunno why but for some reason Trains and alcohol go well together. I'd usually get a beer for my train ride for visits home from Edinburgh and Montrose (<2 hrs) as a student