3D Printed Living Hinge

We were working on a laser cut box and I modeled this hinge and it worked flawlessly.
You can use the sketch and implement it in your design.
I printed it with a material called HCPLA, but probably they work well on normal PLA too, keep in mind that ABS is much more brittle, so probably they'll not work at all or will not last more than 10 times, also ABS loses its flexibility overtime, so go with PLA.
The ones I printed still works, actually I use one as my everyday fidget toy. been on test