GUTsy Captain Kombucha Zero - Passion Fruit is part of the brand's Zero sub-range, a non-alcoholic kombucha line formulated without sugar or calories. Natural passion fruit flavouring is added to the fermented tea base, paralleling the standard Passion Fruit variant in the permanent range. The Zero series was a distinct product launch, designed to offer the authentic kombucha character of the standard range in a formulation without residual sugars.