Hi again.
Hereby I present to you my latest crazy invention.
This (useless) machine can be easily replaced in its functionality with a mug, a mug, however, won't bring you such joy. The whole point of the contraption is that you pull the trigger and the cylinder spins.
The initial idea was to create a design that's 100% 3d printable, including such components as springs or bearings. No external BOM, no screws, no glue, just the assembly (well, bearings could still use some grease).
That's the spirit of 3d printing I love - I can make something pointless like this come to life, just because I can.
I hope you like it!