Erasable pen Bo-Bo Cow - Keep it moo-ving!

Bo-Bo erasable pen with a fun Mr. Wonderful character on one end. On the opposite end, there is a plastic eraser capable of erasing the pen's ink. The ink will only be erased with this specific eraser, otherwise it is permanent. Message on the pen:
Keep it moo-ving!
Ink colour: blue.

This is a veeeery good idea!