Zózimo, RicardoSalgueiro, ToméBoldizsar, Tobias2025-05-092025-05-092023-01-102023-01-10http://hdl.handle.net/10362/182910In Portugal, 54% of people do not drink tap water as their primary water source due to taste, trust, and health concerns. The result is 36,000 tonnes of plastic water bottle waste created annually in Portugal. Puraqua aims to provide an affordable, on-demand water filter solution to leverage water consumption’s social and environmental impacts. This thesis uses the lean startup methodology and relevant engineering tools to guide the development process. It shows how learnings from external validation allowed a business model and product to be refined into a minimum viable product, ready to launch for the Portuguese market.engLean startupAgile product developmentPlastic wasteWater filterImpactExperimentationmaster thesis203517350