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.
This is good advice.
On the bright side for OP, his part should (hopefully) only come into contact with dry coffee grounds so some of those concerns are lessened.
In other applications – sealant or not – I can only imagine pouring hot coffee over a PLA part would not be a recipe for success…