I have an assortment of the 4L cereal containers for dry boxes from different places and sellers (Temu, Amazon, Ali) and they always have slightly different dimensions that left me needing a few different types of desiccant and hygrometer holders. On top of that some used round hygrometers and some used square.

My goal with this model

• Fit any of the 4-5 different types of 4L desiccant containers
• Compatible with either square or round hygrometers
• require no supports
• Hold a sufficient amount of desiccant to keep it </=10% RH
• Fits all my spools (tested with Bambu, Polymaker, Overture, Creality, Flashforge, Sunlu, Eryone, Elegoo, random Amazon brands)

But in the spirit of printing, wanted to put it online in case someone else found some use from it. The lid is very secure. I made cut outs to have make the locking tabs slip in and be more forgiving of tolerances but may be tight depending on machine tolerances.

I've tried orienting the model the way it should be printed for no supports. The dovetail keys on the hygrometer mount face up.