This project was about drinking clean water. When you travel you often don’t know if you can safely drink the water coming out of the crane. And because the Dopper bottle became very popular, you can assume people will bring it during their holiday. I designed a filter to place in the middle of the dopper that contains three tablets that stand for three weeks of safe drinking. The filter is 3D printable and comes with a hook to clip the bottle on to your backpack.