Material choice doesn't matter much, PLA is stiffer, PETG/ASA/PC will bend a bit more.
To mimic the look of the pick from the movie, print the base with black color and then use the color change feature to switch to a green color (3MF already includes these, 1 layer of brighter green and then 1 layer of darker green).
The Prusament Mystic Green works very well with this. :)
Learn more about 3D printed picks: https://blog.prusaprinters.org/does-a-3d-printed-guitar-pick-suck-spoiler-its-actually-awesome_53320/
The included 3MF has a modifier that creates a hole in the top of the pick, so you can put it on your keyring.
Sculpted in Blender
The author marked this model as their own original creation.