This is a small screw-able container that is ideal for adding a small amount of desiccant to your filament rolls while storing them. I use them with reusable silica gel instead of the ordinary silica bags. I prefer to use the ziplock-style bags from IKEA and throw 1 or 2 of the pucks in it as well. This should keep your filament dry within the bag even when it is not 100% air tight. 

I would suggest printing the parts in ABS as the silica can be dried in them directly. Alternatively, PLA or PETG will work as well but the silica needs to be dried separately.

The design is not made by me. Please check out the original designers.