Our Ikea kitchen sink plug has always been leaking. This is a replacement plug that actually works.
after cleaning up a bit, push the pin through the... strainer and put them on top of the plug. then push the pin firmly through the plug. Done.
I had some difficulties in printing the outer curve of the strainer, but it's invisible when in use. After printing, just file away the support pins under the cup using a flat metal file.
all components have been printed with 100% infill and a shell thickness of 2mm