Four students and one teacher were given the chance to see if they could tell which water was which, including one they said was their favorite. The choices were Arrowhead, Evian, Fiji, Smartwater and tap water.

Only one person accurately identified his favorite in the blind taste test – but if you watch closely, you’ll see that several subjects picked that brand as their favorite, whichever they’d said their favorite was. Click play to see which brand was the fan favorite.