Brushing teeth, washing hands, rinsing, drinking - here in Germany we simply turn on the tap and have water at our disposal. As much as we want, whenever we want. But now that the climate crisis is progressing and it is getting drier and warmer, there is also discussion here about whether water shortages are a problem and how we should save water. But regardless of the current conditions, it is important to use water resources sustainably and to use water consciously. Because water is a valuable resource and efficient water use makes sense from both an ecological and an economic point of view.