One of my grandfathers was a salesman. A wheeler-dealer kind of guy.
He worked for the Continental Credit Card company; you could only buy merchandise from their catalog.
One year, for my birthday, or perhaps simply because, he got me a piggybank elephant.
The trunk was curled up, made just so that you could rest a coin in it.
You pulled the tail and that would send the trunk flying backward; it would deposit the coin into a slot carved in the back.
I've seen versions of the same thing since then. I broke the tail.