GUTsy Captain Kombucha Zero Watermelon and Mint sits within the brand's Zero sub-range, a version of the standard GUTsy Captain flavour line formulated without added sugars or artificial sweeteners. The Zero and standard ranges share the same flavours, making Watermelon and Mint available in both formats. As an alcohol-free kombucha, it suits those looking to avoid both alcohol and added sugar in a single drink.