Yep, they did. I got my first one in a bar somewhere in the middle of no-where (those Scots build their bars in all sorts of unlikely places

). I and my brother were still too young to drink beer, so the owner proudly handed us two cans of Irn Bru, telling us that this was one of Scotlands best inventions (or something the like of it). He was a really funny old man.
I remember the old chap only because of that, otherwise I might already have forgotten, sorry but true. I'll see if I can find a picture, I'm sure my dad took one.