Fastening

Press the cup and turn the know so a vacuum is created by lifting the inner TPU cup

Removing

Unscrew the knob (CCW) and slide it off

Printing

For a smooth surface of the TPU cup, use a smooth build plate and place some smooth tape (PP PET or Polyimide).

Print the cup on that area

Other parts must not be printed with TPU, use PLA, PETG or ASA instead.

Postprocessing

For smooth screwing use some Vaseline or lubricant on the rim and thread of the cup.

Assembly

1. Press the small ring (non TPU) inside the thread of the TPU cup for stabilization.
2. Press the pin through the hole of the hook mount ring (from the back side with the notches). (optional just use it with the hole for a string or to hold a sign with that flap)
3. Put that hook ring aligned with the detents onto the cup.
4. Screw the knob onto.