It’a detained by magnets so it doesn’t get in the basket and interfere with spreading out the grounds. Needs a clean up with a lick of sandpaper, pretty stupid but these things cost like 50 bucks /shrug
EDIT: appreciate all the concern for my health, it touches dry coffee grounds. I agree that if it got wet there’d be health problems but unless it gets real humid there’s just no opportunity for decay. As for random leaching same diff, without heat and wet it’s not really a concern.
That said I probably will seal an improved design, this is just a test piece.
3d printed plastic isn’t much worse than other plastic. The grinds aren’t under any force.
Have a look at a printed part under SEM and you’ll see it’s quite smooth and cohesive. Coffee grounds are light and fluffy, they don’t grind plastic.
I think you’re not basing this on any scientific investigation.
To each their own I suppose