I like this guy’s design;
because:
- filament rewind capability without having to open the dry box; and
- ample space to fill with tons of desiccant
In contrast, I tried the cereal box design, but it seems to gain about 0.1g of moisture weight per day. That may not be much in the short-term, but wihout an adequate desiccant buffer, then over the long-term that moisture will be re-attaching to the filament.