Design is heavily based on this model by @HuMa_1372637, so props to them!
Remade their model from scratch to give a little reinforcement to the print as it looked a little weak to me.
Install at the bottom of your coffee grounds container to limit the buildup of mold and make it easier to wash.
I printed mine in ELEGOO's black PLA and it has worked fine so far, little bit of warping after 20 or so cups but it is still perfectly fine.
I recommend handwashing it by just rinsing it off under the tap.
This is a two part model where both files will be imported and sliced differently, but printed as one part, if you haven't done this before then you can see a short guide for how to do this in Orca below:
Slightly scaling the model down might lead to a better fit for you as it might be a bit too snug
The author remixed this model.
Print split into two parts to increase stiffness, remade as step