Jo Prusa filament filter

thingiverse

This is a 3D-printed Joe Prusa filament filter or oiler that requires minimal assembly. Simply cut foam or a sponge to fit snugly inside the filter. To assemble it, just slide the sponge into PT1, then insert the filament through PT1, followed by inserting the sponge into PT2. Next, cover PT1 with PT2 and secure them in place using glue on PT3. On PT3, change the filament after reaching a height of 2 mm while printing.