YouTube is your friend. You will find lots of info from desiccant to oven to dehydrator to vacuum chamber to ...
Here is one to get you started ... https://www.cnckitchen.com/blog/cyo43tzz...0wv8yvv3rs ... that I liked because ti seemed to be objective rather than subjective.
The silica along with the filament in a large ziplock bag (some of my spools will just barely fit into a 1 gallon ziplock but other require the 2 gallon bag) might be what you are looking for as you need to store the filament anyway so no additional space.
I did some research related to "how to keep it dry once I get it dry" (I bought a dehydrator but I have more room than you do) and found I can get silica in bulk and bags to put it in relatively cheaply. Then it was simply "regen it in the oven at 250 for an hour or so" to dry the silica out ... just like I do with the silica that is in the dryer in my air compressor lines.
Here is one to get you started ... https://www.cnckitchen.com/blog/cyo43tzz...0wv8yvv3rs ... that I liked because ti seemed to be objective rather than subjective.
The silica along with the filament in a large ziplock bag (some of my spools will just barely fit into a 1 gallon ziplock but other require the 2 gallon bag) might be what you are looking for as you need to store the filament anyway so no additional space.
I did some research related to "how to keep it dry once I get it dry" (I bought a dehydrator but I have more room than you do) and found I can get silica in bulk and bags to put it in relatively cheaply. Then it was simply "regen it in the oven at 250 for an hour or so" to dry the silica out ... just like I do with the silica that is in the dryer in my air compressor lines.