It works pretty good. I think it won't scratch Teflon but I can't make any guarantees. Thinking it could be used for other scrubbing tasks.  There is a mini stl file as well so you can test your printer settings before printing the big one. Made on my Lulzbot mini with flexystruder and NinjaFlex. I used the standard settings in the Lulzbot version of Cura than changed the temp to 225.   Used the glue stick that came with the printer - it pealed right off.