Danone wanted to understand the use of water in daily life and highlight consumer expectations for water consumption in general, in order to determine the main consumer perceived benefits. It was important to focus on the scientific objectives (also afterwards in clinical testing) to prove and understand 4 certain effects of water. The final output Danone was looking for needed to confirm that water can bring real benefits for consumers and to show which benefits would be most impactful in the market when proven. In order to investigate water consumption from different angles, we implemented a ‘fusion research’ design. Fusion research is a research design where multiple (contemporary) research methodologies are combined in order to study a certain research question from different angles. By applying triangulation, a holistic view is achieved around the same solution or marketing problem. Each of the selected methods adds one piece to the final puzzle and serves as input for the subsequent phase.