I have a lot of empty and unused baby food glass jars, and I saved some of them to become silica gel containers for my filaments dry boxes

So I created a lid with a hole to fit a piece of unidirectional moisture paper (recycled from the silica gel bags)

Probably a future update could be a lid with embedded grid insead of the hole.

It works pretty well because it fits perfectly in my filament dry boxes and because it is made out of good quality glass so I can put them directly in microwave/oven/dryer for silica regeneration (without the lid of course 😁)