Parametric Simple Cup Holder

thingiverse

This is a simple cup holder made to fit any round hole. In one of my classes, the desks have these holes that were originally for desk grommets to pass wires through. There are no computers in this room anymore, but the holes remain. The bare holes seemed to work well enough for people's coffee cups (tapered cups), but not for my soda or water bottles. So I made this. The design was simple, so I added some easy to change parameters so that it may be useful for others. Instructions I've included the STL that I used, but that is mostly just so that you can see the model. You will most certainly need to open the .scad file and specify your own sizes. Just specify the diameters and height and you're set. There are more optional parameters for the bottom supports and lip you can change to your liking as well. The hole that I put my cup holder into left very little room between the bottle and the edge of the hole, so the walls of the cup holder couldn't be very thick for me. I found that with thin walls, ABS was more likely to delaminate, while PLA was rock solid. If you don't have problems printing thin vases with ABS, then you're probably okay either way with this. There's a lot of support material required for this, but I printed it top-down so that the top surface would be as smooth as possible (against the glass).