This is a desiccant container for a cereal box that's used as a dry box. It makes for a nice, easy to remove solution that fits right into the hole in the top of the box, which I believe is 60mm in diameter. This avoids having to take everything out of the box to get to the desiccant for drying. It's printed in PETG, so it should be able to handle the heat of renewing the desiccant. So you just pop it out, and dry your desiccant without even having to take it out of the container!
Here is the inspiration for this project:
https://www.builditmakeit.com/projects/3d-filament-drybox
This is the cereal box you need:
https://www.amazon.com/dp/B09ZLBJQDW