Here is one more solution for filament drying and storage based on the IKEA 365+ 10,6 liters box.
It consists of 4 parts.
The spool holder, the desicannt box, the spacers and the gauge holder. The box holds up to approx 250gr of silica gel.
All parts except the gauge holder can be printed without support. The gauge holder needs a little support as shown on one of the pictures.
The author marked this model as their own original creation.