This is a micro-SD card holder for 18 micro-SD cards. A save place for a lot of data ;-)
It is a smaller version of my popular SD-card holder: https://www.printables.com/model/69096-sd-card-case
After printing you should screw the jar and lid back and forth and clean the thread with a tissue a couple of times, in order to grind the thread in and make it rotate smooth. The longer you screw, the smoother it gets. If you can't turn the lid, try printing it just a touch bigger. 101% for the lid seems to fit on most printers. Or consider to calibrate your printer. ;-)
To archive that pattern on the top you can set the bottom layer to “Octagram Spiral”.
The author marked this model as their own original creation.