A simple and cost-effective way to keep your filament dry. Just fill the container with silica gel beads (you can buy this on Amazon), place the container in the filament roll hole, and place everything in a zip lock back or air-tight container.

The silica gel bead container fits Hatchbox filament rolls perfectly, but it can also fit other brands of rolls, too.

There are two different container designs: grooved and knurled. Pick whichever you prefer.