I didn't like the crappy sink strainer that came with the IKEA sink so I designed a better one. I want it completely flat to be able to easily scrape things off.

Inner diameter of the drain is 80 mm.

Print it upside down. No supports needed.

Don't pour boiling hot water on it if you print with PLA. It will change shape. PETG is much better!

Updated december 2021: Made it a little thicker because it was too easily deformed by hot water when using PLA.