Wanted to hand wash some clothes but our bathroom sink did not have any stopper/plug to do so. So into fusion 360 I went to model one. This one has been working great for months. I printed in TPU for a good seal.

The dimensions I modeled it in are the bottom part of the plug has a bottom diameter of 25mm and top part of 33mm. The "Larger Version" has a 37mm top diameter. If either does not fit your sink you could easily scale the % in your slicer.

Print instructions

Make sure to print in some sort of flexible filament!