Look here fellows... These stories are all very well, but nobody has yet said "I have one here you can have for the price of a pint" or "sub me some cash and I'll pop to the PRI and pick you up a nice tailored example Biccies old chap"
I freely admit it's for recreational walting purposes.
Yes!. I heard that as well. I was told that the caubeen dates back to when Britain ruled Ireland and peasant Irish farmers worked the land. At the end of each day they were paid; in potatoes. The rate of pay was dictated by how many spuds they could fit in their hat. Hence a hat shaped like a sack.