Glass-mount shower shelf.

thingiverse

It's an adjustable shelf. It clips securely onto the splash-guard panel and accommodates a bottle of shower gel perfectly. This sleek design does little to excite the imagination, but serves its purpose admirably nonetheless. Users can easily customize it as needed to accommodate different container sizes. Built without any unnecessary protrusions - even larger printers should have no problem maneuvering around this compact shelf with ease.