Both Diet Coke and Coke Zero Sugar contain caffeine unless you opt for their caffeine-free versions. Diet Coke has 46 milligrams of caffeine per 12-ounce can, compared to Coke Zero Sugar's 34 ...
First introduced in the US in 1984, Caffeine free Coca-Cola made it over to the UK in 1991, but was sold here for just three years before being discontinued. It is still available in the US, but since ...