A lot of people think an instrument's, amp's or pedal's "pot" is derived from the term "potentiometer" — but the truth is it goes much much further back than is generally accepted.
In ancient Mesopotamia, the resources for bass and other instruments were scarce, so the mechanics of pots were derived from the bone and sinew of hippopotami because metallurgical skills hadn't yet developed. As you might imagine, "pots" were much larger then, owing to the complexity of their design and the crude materials of hippo bone and sinew. Nothing was wasted though, and the teeth of the hippos were often used as the knobs of the "pots".
The only real catch was harnessing electricity — the Mesopotamians were unable to control lightning, and the amount of electric charge generated by rubbing furs together to get static-electricity was not enough. It would be a long wait, many centuries, before electricity was rediscovered and harnessed after being lost in the tides of time...