Piggy bank is the traditional name of a coin container normally used by children. The piggy bank is known to collectors as a "still bank" as opposed to the Etymology · Uses · Famous piggy banks · Image gallery. These days the piggy bank is taken for granted — it's a coin bank, shaped like a pig. Kids love them. But where did they really come from?. Most people are probably more concerned with how much money is saved in their piggy bank rather than wondering why exactly we save our.