Alcoholic soft drinks have become rather popular for teeners and adolescents. As synonyms are used: alcoholic mix drinks, alcopops and breezers. A casus is presented of a 18 years-old boy with occlusal dental erosion in all 4 quadrants, drinking the last year frequently alcopops. Due to their strong acidic character (pH < 4) alcopops have an erosive effect on dental enamel. Mixing 1 ml whole saliva with 2 ml alcopop in vitro resulted in a decrease of pH below 4. When 5 ml alcopop was held in the oral cavity for 15 sec the pH declined to below 4.4. If subsequently the mouth was rinsed twice with mineral water the pH of the oral fluid remained below 5.3.