Having started as a group of five close friends from Switzerland, Linus and Christian have recently committed to start working full-time on Bottle+. We are both alumni from the Swiss Federal Institute of Technology in Zurich (ETH Zurich) and have our background in environmental engineering, sustainability consulting, mechanical engineering and process automation. We know each other since 10+ years from handball and hence fully trust each other, and: We both love drinking sparkling water. However, we want to consume it in an environmental-conscious way. The plastic pollution generated by PET-bottles is enormous. About 1.3 bn plastic bottles are sold daily which would be a pile half the size of the Eiffel tower. Therefore, in summer 2020, we brought Bottle+ to life and are working on this mission ever since to make sparkling water available anytime, anywhere & without single-use plastics.