A more efficient waste management, the reduction, reuse and recycle of materials to address the challenges of climate change. This was at the core of the challenge of Climathon Venice 2018. The project “LightBlue” won Climathon Venice 2018: an idea of a young team that aims at combining economic incentives and technology to address and reduce the impacts of the plastic produced by tourists in Venice every year. LightBlue will promote the development and distribution of sustainable and eco-friendly water bottles that represent a real “ticket for Venice”: the QR code printed on the front side of the bottles guarantees discounts for local transport and museums. A way to encourage the enjoyment of the beauty of Venice in a green perspective.