I wanted to create a high capacity, 100% printable box for storing bulk silica gel desiccant. A lot of the designs I looked at required extra hardware, were too small, and had holes too big for the smallest gel beads. I designed this with 1.5mm slots so even the smallest 2mm gels will not fall through the cracks.
This box lowered the humidity in my dry box from 48% to 16% in just a few hours. I plan to use a strong tape to attach this to the underside of my dry box lid, which is why I left the bottom of the box solid.
100% for screws/top, 20% for bottom box.
I would recommend putting the screws in while the box is empty, as the first rotation requires a little extra force. Once you've inserted the screw once the second time is much easier.
Fill with any bulk silica gel. I used this one: http://a.co/d/gj187i4