one of the most common trends among consumers in recent years in various countries, including Saudi Arabia, is the replacement of their daily water intake with bottled water, possibly due to apprehension about contaminants in natural water supplies. Sales of bottled water are available in Saudi Arabia supermarkets. The substitution of commercial drinking water with bottled water is a serious concern because the benefit of drinking fluoridated water may be lost. The dental caries reduction that derived from drinking fluoridated water is well documented and water fluoridation is considered an economical and safe preventive measure.