Our kitchen sink came with a stainless steel grid to protect the bottom from scratches. The grid had plastic or rubber feet which eventually wore out and became gross. I found many sites that sell sink grids but none that sold just the feet, so I modeled and printed replacements.
My sink takes 8 feet so I print batches of 16 at a time and just throw the old ones away after six months. I’ve done them in both natural TPU and black TPE.
Model available here.