Diet Rite is an American brand of no-calorie soft drinks that was originally distributed by the RC Cola company. Diet Rite was introduced in 1955 and initially released as a dietetic product, but was introduced nationwide and marketed to the general public as a healthful beverage in 1962.

簡単にいえば、ダイエットコーラが先に発売され、さらに炭酸強めにした男性向けダイエットコーラということでコークゼロが登場したらしい。

Diet Coke (also branded as Coca-Cola Light, Coca-Cola Diet or Coca-Cola Light Taste) is a sugar-free and low-calorie soft drink produced and distributed by the Coca-Cola Company. It contains artificial sweeteners instead of sugar.

Regular Diet Coke and Pepsi taste like petrochemicals, the "Zero" versions are better but Diet Rite Zero is still better. Some people, mostly fat women seem to be addicted to the chemical tastes of the regular Diet Coke and Diet

Coke Zero, as it was known when this product was launched, is a completely different animal than Diet Coke. While Diet Coke has an extremely unique taste, the cool thing about Coca-Cola Zero Sugar is that it actually sort of tastes like Coca-Cola, the world's best selling soda — by far .