I designed this kind of Viking cup holder for have a proper place of any drink in the bedside table, desk, wall or surface needed, just we need 2 screws and the 2 pieces print, pretty easy to install and holding system, i made the test print and fixed the tolerances in between the pieces so everything is working great, you can see more of my work on IG: https://www.instagram.com/christopher_guillen_3d/