Great project, everything that reduce the plastic pollution is good. As the kickstarter page said :
Over 500 billion single-use bottles are made every year. Very few are recycled. Many of the remaining go to landfill or the ocean.
1 plastic bottle = 1 pair of sunglasses. And, the design of this sunglasses is pretty cool and so expensive with polarised, only 60$ US (80SAU).
Thanks @shaanivc for sharing this project.