Well who is more stupid? The people who think that beer that is half the price of water is worth drinking, or the people who are prepared to pay that much for water?
It's just been pointed out to me that "Evian" spelt backwards is "naive"!!!!
Adjective naïve (comparative more naïve, superlative most naïve)
Lacking experience or understanding; inexperienced; unsuspecting.
Having a lack of sophistication.