I needed a sink stopper for the kitchen sink in the house we're currently renting. Rather than buy something that might sort of fit, I designed a stopper that fit that particular shape.

I've included that STL as an example. I've also included the OpenSCAD source.

The OpenSCAD parameters are:

• od - outer diameter

• dtd - drain top diameter

• dbd - drain bottom diameter

• pdt - plug depth

• th - thickness

Printing

It should print well as-is, without supports, depending on how good the slicer is at handling bridging. PETG or PLA should be fine, but TPU will likely provide a better seal.