What is the origin of the piggy bank?

It seems a little strange that we'd pick the shape of some livestock animal for a receptacle for our spare change.

SumDude2012-06-26T23:35:52Z

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my understanding (from long ago) is that "piggy" refers to the pig-iron metal that they were first made out of. Of course, then that lead (<no pun intended) to the use of the shape of the barnyard animal.

try google, or your grandparents