I have come up with a new bad invention! Flatware for flatworms, or flatworm flatware. Knives, forks, and spoons shaped like Planaria!
They could have some aspect where they nest together and appear to make a larger flatworm which comes apart into separate worms! Because of the idea that you can cut them up and they regenerate from various parts (whether that is really true or not).
Needs some sort of reference to notochords but I can’t quite think what.