There is 40mg of caffeine in an 8-ounce serving of Sunkist orange soda. The same amount of caffeine is also in an 8-ounce can of Mr. Pibb.
The level of caffeine in the drink is considered high in comparison to other sodas with the same serving size. It is higher than Mountain Dew, Diet Coke, Dr. Pepper, Wild Cherry Pepsi and A&E Creme Soda, with 37mg, 30mg, 27mg, 38mg and 29mg of caffeine respectively. However, it is lower than the 69mg of caffeine in Pepsi Max. Some soft drinks have no caffeine, including Sprite, 7-Up, Fanta, Fresca, Sierra Mist, Slice and Mugg Root Beer. Sunkist is one of the only fruit-flavored sodas that contains caffeine.