This is a container with a twist-top mechanical iris opening mechanism. The project requires (10) 5mmx16mm metal dowels, which can be purchased on Amazon. Glue is required - I recommend JB weld. See my Youtube page for an assembly video.
https://youtube.com/shorts/Pkz72YNvrwk?feature=share
NOTE: Video shows process after metal dowels have been glued into pieces “FRAME-TOP” and “INNER RING”