Desiccant container for eSUN cardboard spool with 54 mm inner diameter and 62 mm width.

Designer's note: this model is as great as ever, but I have improved and have followed your advice and comments with interest: "perfect fit, but could the model made lighter and faster to print?".
Yes, that's possible! To be precise, 128 % faster (1h16m > 33m28s) and 46 % (28.05 g > 15.14 g) lighter!
Check this out: eSun cardboard spool silica gel desiccant bin

Precisely fitting desiccant container for insertion in the center of the spool.

With rim, without rim, with cut-out for thermo-hygrometer, without cut-out, you decide what you need. I personally use this model with rim and thermo-hygrometer.

Easy to print, no supports or sharp overhangs.

Ideal for storing in vacuum bags or cereal boxes.

Compatible with all spools of the same design.

Tested on the following eSUN cardboard spool (as reference):

eSUN PETG Filament 1.75mm, PETG+HS

By the way, this filament prints like a charm on my A1 Mini and my P1S, from an external spool. I don't like cardboard in my AMS.

This model is part of the Spool desiccant holders collection. Do you have a spool that is not in the collection? Let me know and I'll take care of that!

How I create my models

I started developing 3D objects myself in 2010, when I got into 3D printing with Prusa Mendel. I still use the software I used back then: OpenSCAD. So if anything should not fit, let me know, adjustments are done with a few variables, because this model was also created from scratch in OpenSCAD.

The Model in the pictures was printed with Bambu Lab Basic PLA.