What is Robi for? You can just drink tap water, right?
In Belgium, tap water meets the strict drinking water standards everywhere. So you can safely drink tap water anywhere in Belgium. Many people (around 40% of the Belgian population) also drink plain tap water every day, and are therefore satisfied with the taste. And it is certainly also true that simply drinking tap water is EVEN more sustainable and cheaper than using Robi.
However, another 40% of Belgians drink almost exclusively bottled water, and most do so because they don't like the taste of their tap water. It is mainly for those people that Robi is intended.