For those with Bambu spools and AMS:
I printed 2 of these (the outer 2, since I already have the hygrometer setup in the middle):
https://www.printables.com/model/423765-silica-dry-box-for-bambulab-ams-hydra
and a bunch of these that fit inside the bambu spools:
https://www.printables.com/model/536741-bambu-lab-re-usable-spool-desiccant-container
Both are high quality fits and designs.
-- they hold loose, reusable desiccant.
Brought my humidity to 10% and you can bake or microwave the loose desiccant to reuse it. It also changes color to orange when it become saturated so you know when to change -- same as I use in my air system.
https://www.amazon.com/dp/B013L31PQ0?ref=ppx_yo2ov_dt_b_product_details&th=1