4L Cereal Box Desiccant Dry Pod w/ opt. bearings

Description

I made these as every other option I saw didn't have all the features that I was looking for. I really wanted something that fit BOTH 4L Cereal box styles (as I have a mix of both) and wanted a common pod across both box types. I also was looking for something that was easy fill, high capacity, and something that properly monitored the air in the box rather than the desiccant chamber.

Updates

3/13/2026 - Added profiles for the filament labels! Use text editor to modify the manufacturer and filament type. Manufacturer text should be centered at 0,12 for object coordinates and filament type should be centered at 0,-2 for object coordinates.  Shrink size/spacing of text as you see fit as needed!

3/8/2026 - Added a center ‘nub relief’ that is present on the bottom of most boxes to enable it to lay perfectly flat.

✨ FEATURES

✅ Wide Compatibility - Pods fit both common styles of 4L Cereal boxes available. Note, some of the single, wide groove boxes have skinny lids and do not allow filament to freely rotate, and for that reason I don't buy them and thus cannot promise compatibility with those skinnier models.

✅ Overkill Capacity - Each pod holds 250g of desiccant.  That's enough desiccant to completely dry out 100% humid air in the 4L container over 3,000 times. Seriously. I only fill mine halfway, but hey, the option is always nice.

✅ Retraction-free Venting - This style prints WAY faster, isn't prone to clogging the nozzle, and uses a LOT less filament than typical venting designs.

✅ Easy Fill - A large, easy to remove/install door on the rear gives easy access to the single, large desiccant chamber.

✅ Space-Saving print orientation - Prints standing up! You can fit a BUNCH on a single build plate. More than you probably want. I print mine 4 at a time, but there is room for plenty more.

✅ Support Free, snap-fit axles - This design is forgiving to print settings and filament calibrations, and is dead reliable. Also, prints laying down for the best, strongest orientation of the locking tabs. They are also optional. If you don't want bearings and don't intend to feed from the boxes, just don't print the axles…they aren't required, and do little to impact the aesthetics of the pod. Bearings used are the prolific 608 bearings commonly found in the 3D printing community.

✅ Filament Label Ready - I'm finalizing the files for the labels shown, but they are just 60mm wide, 30mm tall, 2mm thick, and have 2x2mm posts 10mm long spaced 50mm apart on center.

✅ Support Free - None. Zero.

✅ Uses Economical Hygrometer - Barely a dollar! https://www.amazon.com/Hygrometer-Humidity-Thermometer-Fahrenheit-Thermostat/dp/B0DNKGBW54

✅ Fits the PRAKI 4L boxes found on Amazon - Also works with virtually all other wide-lid Cereal Containers. Note there are skinny versions as well, but most in the community do not like them as they pinch the spool, deforming the box a bit and making it impossible to feed filament from the box. I don't own these skinnier boxes so can't attest to the compatibility with these skinnier models.  The ones I have landed on as my favorite are these: https://www.amazon.com/dp/B0FJY42KHD

⚙️ Printing Considerations

Overall, if you use the filament profiles, you'll be in good shape. I've printed these in PLA, PETG, and ABS. All print well, but personally I prefer the ABS versions. I like the door gliding best and the axles snap in and out really well with good springiness. PETG also works well and should survive drying the beads inside, but PETG is a bit sticky and the door doesn't glide as well (though still perfectly functional). Other than that, do NOT check “detect thin walls” and do NOT use Arachne line generation. These options both will break the venting design of the print and you'll be left with a pod with large holes in it.

Be sure to check out my other designs as well! You may be interested in my 4L Cereal Dry Box wall mounts which have retention!

💡Please Share your Thoughts Below in the Comments Section! I'm always looking for Feedback! Thank You!