The differences are very interesting. In Ontario, once you buy the carboy, it's yours and there is no tracking. The store takes the cash, fills the jug and I'm on my way. There is a slip on plastic label that is put on when you buy it and all the jugs I've seen at the refill station have them on, and I would guess that if it was missing they would replace it.

WBear, has chlorine in carboys always been cheaper than bleach?