This is going to sound SERIOUSLY tragic, but as a kid, I collected smarties tubes (there were a LOT of different designs over the years I'll have you know!) from both here in the UK and mainland Europe, dating back to the early '90s.
They were still in the loft until last week when, after getting in touch with The Museum of Brands in London
http://www.museumofbrands.com/, I donated them to them!
I was in London anyway, so I waddled along with a BIG box full of the tubes and various other things out to where it is in Notting Hill.
If you have never been to that museum, I'd recommend it, it's FULL of the sort of things that you had either forgotten about or you haven't seen in YEARS!
Who knows, you might even see some of my smarties subes somewhere, and what's more, I got to speak with the currator, Robert Opie, who seemed to be particularly interested in an example from Southern Ireland which was in fact just a long thin box the same size as a tube.
Anyway, here is the link:
http://www.museumofbrands.com/