A revised version of a simple remix of a the Desiccant Spool Carrier for Bambu Lab's spools. It can be kept in the spool while printing and in storage. The initial remix replaced the holes in the lid with a cut-out for a hygrometer, mainly useful during storage, and has a very tight fit, to keep the hygrometer from falling out.
Update: Added a new version with two lid options that include a channel to allow air to pass into a hygrometer chamber. This version keeps the desiccant from getting into the hygrometer, and has a looser fit to more easily remove the hygrometer for replacing the batteries. (thanks @HMaster_1471507 for the great idea!)
Update 2: Added a new file (perforated_porthole_desiccant_container_v3.stl - for use with lid v2) with a porthole to view the color of the desiccant. This model is designed to allow the placement of a 0.5" x 2mm acrylic disc (available here or here), while printing, by adding a pause through the slicer or G-code before layer 16. This allows you to judge when to replace the desiccant either based on the humidity reading of the hygrometer, or by the color seen though the porthole. (thanks @JJRaymond_1656252 for the great idea!)
3MF Build plates:
The new containers are a bit shorter than the originals, to account for the increased height of the new lids. The distance between the inside faces for both v1 & v2 is 63mm. You can mix and match the old lids with the new containers for a narrower spool (57mm), or the new lids with the old containers for a wider spool (69mm).
Update 3 (08/24/24):
Changed the design of the perforations, applied them to the cylinders and lids, included options for screw-on and snap-in lids.
The author remixed this model.
I added a cut-out for a hygrometer. I've also added a channel to allow outside air into a hygrometer chamber that can either be isolated or exposed to the desiccant in the container.