All parts can be printed as shown in the pictures without support. The lid-inner ring and outer ring should fit together with a little play, otherwise this must be adapted for your own 3D printer (scaling in Slicer works). A piece of fabric and synthetic wadding is used for the assembly. The synthetic wadding is placed in the fabric as shown in the pictures and then clamped between the inner and outer ring.
The author marked this model as their own original creation.