Your kitchen sink can get very messy during the day. A lot of clutter can accumulate in the bottom of the sink, why add the dish soap bottle and cleaning sponge to that clutter?

Here is a simple 3D-printed caddy that can hold your sponge and a small dish detergent bottle above the clutter and make them easily accessible. This caddy will fit domed or square sink dividers. It holds an abrasive/sponge and a small detergent dispenser that can easily be refilled from bulk detergent jugs.

Supplies

3D printer of any type and filament. I always use PET-G.

A small dish detergent dispenser bottle.

An approximately 3"x6" sponge or sponge with an abrasive side.

Step 1:

To avoid printing supports, there are 2 STL files the Sponge holder for a CURVED (or Square) sink and a second for the Detergent bottle. They are super-glued together to avoid slicer supports.

Slice the STL files:

SpongeHolderCurved.stl (or SpongeHolderSquare.stl)
SoapBottleHolder.stl

3D print the files. .2mm layer height and other parameters that work on your 3D printer.

Super-glue the SoapBottleHolder to the SpongeHolder.

To avoid gluing (slicer supports recommended)---

Use the SinglePrint.stl for curved sinks.
The right image above shows the combined stl files for a single print.
The slicer should be able to combine both stl files for a single full print (supports suggested).
Combine SpongeHolderSquare.stl and a rotated SoapBottleHolder.stl if needed.
The angle needed to mate the 2 stl pieces is about 11 degrees.

Hang in your divided kitchen sink.