Private Bag

As part of my job, I need to get scientific articles from New Zealand from time to time.  The correspondence address on these often includes the term “private bag.”  A private bag is what we in the US call a post office (P.O.) box.  But I always picture a reticule* or some kind of supportive undergarment.  OK, Kiwis, I know I’m a perv.

*reticule=a little purse with a drawstring, used in 18th and 19th century (I think–I don’t have time right now to do research on costume history)