The idea behind our start-up “Cap Coin” is simple yet revolutionary: recycling plastic bottle caps to create filament for 3D printing. Our goal is to reduce plastic waste while providing innovative and useful products. The process begins with collecting plastic caps, which we transform into high-quality filament, a crucial material for 3D printing. This filament will be used to create various 3D models, ranging from useful items to artistic pieces. A key feature of “Cap Coin” is community involvement. We invite people to actively participate in collecting plastic caps. As an incentive, we allow them to exchange a certain number of collected caps for 3D models that we produce. This way, we not only contribute to environmental protection but also promote awareness about recycling and sustainable development. “Cap Coin” combines ecology, technology, and community in a unique project that has the potential to make a real difference in reducing plastic waste and promoting creativity through 3D printing.