These hooks would be perfect to organize a barrage of thing for your pool or just to use for hanging your towels and robes.  Can also be used in the garage, basement or anyplace that needs some organization done. I also personally use these to store all my power cords in an orderly fashion but there can be many other purposes.  Print and use a two or as many as you want as they interconnect and are very sturdy.

If you are looking for just a single jhook I have another variation available at this location:  https://makerworld.com/en/models/488133?from=search#profileId-401005

Interlocking Mechanic:

Each piece can be interlocked via a tight fitting dovetail connection which allows you to build as many hooks in your space as needed.

NOTE: These are a tight fit so a small hammer may be needed to tap them together.

Two variations:

Depending on the need, you can print or mix these with an open face or more closed face approach.