Making a dry-box for my 3D printing filament

I have a 3D printer that I use for my rocketry projects, but there's a problem. The plastic filament that it uses will go bad if it sits out and absorbs enough moisture. So, I designed and built a dry-box that will stop the filament from absorbing moisture, but will still allow the filament to be fed into the 3D printer. Here are the files I designed if you want to make it yourself: https://cad.onshape.com/documents/6091773788db9f89bcaccb78/w/f9f81033333fe32e3688f783/e/6e7d26402f1b3b583629801b?renderMode=0&uiState=66b6083e5a3218728784a5e6 

Here is how I made it, step-by-step:

Step 1. I got 3D printed all of the pieces, and got a plastic cereal box:

Step 2. I attached the divider between the main section and the section where the filament if fed through. I also drilled a hole in the bottom of the plastic cereal box and glued in the part with the hole in it, through which the filament will be fed:

Step 3. I marked the two side parts with where they would be glued in, and then glued both of them in:

Step 4. I glued in the x-shaped piece to provide support for the side pieces:

Step 5. I poured a lot of blue water-absorbing balls into the main section:

Step 6. I attached the base to my 3D printer:

Step 7. I put the roll of filament into the plastic box using the cylinder, which rests on the two side pieces:

And it's done! Here's some pictures:

Here is a 3DBenchy (a model used to see how good the 3D printer works) that it printed perfectly with this setup: