Channeled Marble Towel Hook

prusaprinters

My wife asked me if I could design and 3D print a “hook” to hang our shower mat/towel for drying.  I wanted something that wasn't going to protrude out too far from the wall or that something could be caught on.  After searching around, I discovered the idea of an internal ball hook and came up with this design.This design utilizes a 15.8mm diameter glass marble, which I assume is a common size since I had several of them laying around.I made this particular towel holder with 2.5mm in clearance which is the thickness of the border on my shower mat.  This gap should be enough to work properly with a standard bath or hand towel, as well.Print SettingsVertical orientation (upside down with two prongs pointing upwards)PLA (or PETG would also work).2mm resolution15% infill (gyroid)No supports, rafts, nor skirtsPrint NotesInsert a pause at 50.00mm during printing in order to insert marble into modelInstallationI used Gorilla Tough & Clear Double Sided Adhesive Mounting Tape along the full length of the back of the hook, peeled, and stuck to wallHow to hang towelPlace the edge of the towel into the hood from below and lift up into the clampPull down on the towel allowing the marble to grip it and lodge into its lower positionHow to remove towelPull the towel upward and off to the side to dislodge the marble while sliding the towel away out of the hook