A completely printable and functional zipper. As a replacement or for your own e.g. cases, bags or cosplay projects. 

It's not the final version yet more of a proof of concept. But it holds together stable in all directions (as long as you don't overdo it with the forces and hold the bottom together) that may probably vary depending on the 3D printing settings.  Holes for sewing are also available.  
After printing, do not simply press the zipper together, as this could damage individual teeth. Instead thread the zipper into the slider from upside down so that both sides come together in parallel in the correct curve :)  

I will add an improved and flexible (TPU) Version soon.

Material (PLA) consumption <5g 
Layer height 0.1 - 0.14
Print the first layer very slowly