Check out my new drying spool for the AMS 2 Pro (rotatable):

Link

This filament dryer spool should fit all filament dryers. The printing time is relatively short and drying is very quick because the contents are ideally distributed. I recommend ASA, ABS, or PETG and tested ASA and PETG HF at 70 °C for 10 hours without any problems in my Sunlu FilaDryer S2 and Polymaker PolyDryer. If you are using a different dryer and want to be sure the material will hold up, I would use ASA or ABS or lower the temperature a little bit.

one-piece version: This is my favorit version (no glue, no support)

two-piece version: This is the first version. The two parts have to be glued together. 

big version: This version offers twice as much space for silica gel.

lid and funnel: Here you have a lid and a funnel to screw on.