Silica gel containers

The round silica container has M50x2 threads for screwing on the lid, it's designed for a spool hole of exactly 53mm and can be placed inside the spool. I printed them out of Nylon, but PET-G or ABS could also work, I designed them in such a way that you can keep it in the spool and dry it along with the spool in the oven.
I used a modifier cylinder in prusa slicer to remove the top and bottom layers to expose the 30% cubic infill and make sieve, 30% infill is enough for 3 to 4mm silica gel balls.