Well said Olog-hai. Without water you would die from your own filth not being flushed out. Mainly via the kidneys.
If the EU was trying to point out that different brands of bottled water were no better and/or beneficial than tap water then an advisory is all you need, not another freaking law of course unless you need to collect fines to keep the bureaucracy running.
Of course pizza is now a vegetable here in the US so I don’t see much difference between us and them.
Good point!