Silica Gel Holder for Inside Filament Spool

This is a remix of a random silica container I found here. I redid the sizing so the diameter fits most 1kg filament spools, and the length should fit just inside the roll so as not to interfere with the other rolls. Whenever the filament spool is not mounted using the hole in the center (e.g., while in a dry box/AMS/dehumidifying chamber/long-term storage), this container can serve as an extra source of desiccant.