I tried a lot of boxes on thingiverse, however, most of them the caps were not screwing properly, and can't be downsized. I needed a small box with a cap to put on my pocket to carry one day meds. I decided to come up with a simple print in place, so support box with a cap that can actually work. I decided to make the design on Tinker cad, as it is pretty much simple.
The best thing in this design is that the cap actually works. As soon as it is printed, you can use, no struggles. I managed to get it as small as 50% with no issues.