How to extend the lifetime of plastics? This might sound as a somewhat odd question in the age of bio-degradable plastics, but plastics that can withstand extreme conditions can be (re)used more often and thereby thus contribute to an eco-friendly economy. In order to improve these plastics, we need to adjust them and that is not easy! Traditional plastic modification technologies often require a lot of energy or dangerous chemicals. To by-pass these traditional measures, we explored, and pushed, the boundaries of novel eco-friendly technologies. We studied how enzymes, nature’s architects, modified plastic drinking water filtration membranes, which proved to occur in in a completely unprecedented manner. Additionally, a novel eco-friendly chemical tool for modifying plastics opened up a whole new route towards water-repellent materials. We hope that, through our research, we get yet a little closer to a sustainable future.