Low Calorie Cola Flavored Soft Drink with Sweeteners With its light crisp taste. Diet Pepsi gives you all the refreshment you need with zero sugar and zero calories. Enjoy the light taste of Diet Pepsi best served chilled or over ice. Ideal for parties meals and celebrations big and small and everyday Pepsi diet soft drink is low calorie cola flavored soft drink with sweeteners. It contains a source of phenylalanine and comes with zero sugar zero calories and zero carbs. It is best served chilled.