When you find yourself at a Makers Faire on the shady side of town, and you need to keep your nozzles handy.

Disclaimer: I know this is a joke, you know it's a joke, but your local authorities may not have been issued a sense of humor at the station, so print and keep this at your own risk.

P.S. I would love to see one of you MMU types print the letters in color. I did a render of this in color and it looked awesome.

(This is a re-mix of a design from Thingiverse: https://www.thingiverse.com/thing:1857628)