Tango Dark Berry will be available from 8 March is 500ml bottles (£1.45/£1 price-marked-pack), a two-litre bottle (£2.59), a 6x330ml multi-pack (£3.49) and 330ml single cans (67p).
The launch will be supported by digital and in-store activity and from May, the brand will also feature across TV, video-on-demand and digital platforms.
Brand owner Britvic said sugar-free choices are “of particular importance in the fruit carbonates segment”, having grown 18% in the last two years.
It said the value of low-calorie drinks has grown 7.7% in total soft drinks over the last year, as sugar is a “key consideration for shoppers” – 33% are trying to reduce it in their diet by purchasing sugar-free soft drinks.