Water is a vital life support for plants, animals and human beings and is hence something we cannot do without. In our daily lives, we use water mainly in cook- ing and washing. Drinking water from the tap spares (packaging) waste, money, time and energy! Tap water is less expensive than packaged water, produces no waste and does not need transport over long distances. Additio- nally, tap water is the most tested and checked ‘food item’ in some countries, for example in Germany. Check the tap water standard in your country.