Britvic roster agency Clemmow Hornby Inge is working on an advertising campaign for the brand, which will be one of Britvic's biggest product launches next year.
The company is developing the brand under the working title of Project Cream. The range of flavoured carbonated drinks may be marketed as a sub-brand of Britvic's Tango portfolio.
Britvic is considering different packaging options for Freekin' Soda, including cans and bottles.
Neither Britvic category director Andrew Marsden nor Clemmow Hornby Inge would comment on the launch of Freekin' Soda.
"We follow strict processes regarding the launch of any of our new product development (NPD) and we are therefore not in a position to discuss any NPD product," said Marsden.
Britvic's brand portfolio includes Robinson's Fruit Shoot, Tango and J20.