Hey guys, I work for Precious Plastic , we could design the mould for this and then people around the world could make their own sunglasses with plastic waste using our open source injection machine. What do you think? Here are some examples of someone in our community that make sunglass moulds:
https://bazar.preciousplastic.com/moulds/injection-moulds/premium-mould-6-sunglasses-mould/