I created this holder to avoid having to drill holes or glue the holder somewhere.
On my second print, I played with the slicer settings and left out the top and bottom layers. Additionally I printed the perimeters of the first and last layer in a different color.
Currently there are versions for the following table top thicknesses:
25mm
28mm
Update 2022-06-14
30mm
Feel free to leave me a comment if you need a different size.
The author hasn't provided the model origin yet.