this is a fun keychain i made after printing a coaster by snasa on pintable's the nozzle i use here is from that model. i have a large printer so i couldn't print it small enough to be ‘keychain sized’ but im sure some of you can easily scale it to something a little more practical. Print the nozzle facing downwards.

here is a link to the coaster you should check it out it is really awesome https://www.printables.com/model/231240-coaster-printing-in-progress