This is a parameterized sponge holder that hangs on the center separator of your sink and can hold two sponges. If you want it single sided, there are two other versions:
It's parameterized so I generated many different sizes so you can match your own sink and sponges:
With those two sizes search through the STLs to find the appropriate one. The sink center width should be pretty much an exact size, so I produced every millimeter between 15mm and 60mm. It needs to fit snug, friction fit, so that it doesn't move. The sponge needs to fit loosely, so I produced it every 5mm between 20mm and 60mm. Measure your sponge and go to the next bigger one. If you need other sizes, let me know and I'll produce them.
When printing, I found bed adhesion to be a problem due to lack of surface area, so I had to add a brim to print it successfully:
I have also uploaded the Autodesk Inventor ipt file in case you want to modify it.
The author marked this model as their own original creation.