John Crabbie's Ginger Beer Diet and Twist of Orange are rolling out now in 70cl sharing bottles and 330ml single serves (rsp: £2.49 and £1.29).
The diet version contains just one calorie per 100ml serving, compared with the 45 calories in the original John Crabbie's Ginger Beer, which was launched in November 2010.
The drinks, which are recommended as served chilled or over ice, are positioned as an everyday alternative to traditional soft drinks.
"Consumers are increasingly looking for alternatives to alcohol, which have led to reductions in consumption," said Richard Clark, head of innovation, Halewood International.
Other products in the Crabbie's range includes Alcoholic Ginger Beer and Cloudy Ginger Beer.