My vari electric standing desk came with 2 attachable storage hooks.  I created a variation and use it to store my spray isopropyl alcohol bottle.  

Printed in PLA, 0.6 nozzle, 0.32 layer height, and 3 walls.  Otherwise, I used Bambu Lab slicer standard settings for PLA basic.  No supports or brim.

It is slightly larger than the desk thickness.  Use two-sided tape and anti-skid shelf liner or similar thin, grippy material to make a firm fit.