This is a shower caddy I made to fit my shower.  It's designed to hang from the shower head coming out of the wall commonly used in the USA.  It was designed to be printed on a 300mm x 300mm bed.  I think you might be able to scale it to fit and still connect and fit in a shower, but I haven't tried it.  I'm going to work on a smaller version that should fit 250 x 250 beds but I'm new to 3D modeling and resizing it started causing me lots of problems that will take me a bit to figure out.  I recommend printing all parts in PETG.

NOTE: The only part that needs support is the hanger.