This is a quick printing filament spool. The largest size could hold up to 250-300 grams with no issues. The middle size could hold up to 200-250 grams with no issues. Smallest could hold up to 150 grams. 2 pieces clip together and no glue is needed with this version.
Filament pictures shown with 180 grams on middle (30mm) size (yellow), and larger (40mm, green) size.
The author remixed this model.
I changed the fill pattern as it prints quicker. The filament start is also at a better angle.