A fun fake zipper that you sew on as a button.
The pull works. I printed this in place with PLA at 0.3 layer height with no support . Getting the pull to separate take a gentle pry with an x-acto knife.
I added a secon sliced file for 4-up at 0.2 layer height and a brim. This seems to produce a nicer result
The author hasn't provided the model origin yet.