“Filament Spool Desiccant Canister” is currently the best way to manage desiccant for the AMS and storage. The funnel model suffers from what I believe is a bug in Bambu slicer bug where it leaves a hole in the threads despite the model looking visually ok.
This model remixes the funnel to add reinforcement on the inner wall of the threads so that it slices and prints properly.
UPDATE 2/5/2023: The original model was supplemented with a thick walled version of the funnel and it seems to slice fine so this one is likely unnecessary.
The author remixed this model.