GUTsy Captain Kombucha Coconut is a kombucha made in Portugal, where it has become one of Europe's best-selling versions of the drink. Kombucha is a fermented tea, and this one is built from green tea and cane sugar that ferment together to produce its live bacteria. The result is an alcohol-free drink at 0.5% that stays lightly carbonated. Natural coconut flavour runs through it.