HOLOS Raspberry & Elderflower Organic Kombucha is a kombucha, an alcohol-free fermented tea made by brewing tea with a culture that ferments the sugars. This is a newer recipe from the brand. The raspberry gives it a fruity, sharp side, while the elderflower adds a delicate floral one, set against the sweetness of the ferment. Kombucha is fermented for gut health, and the brand suggests this one as an after-dinner drink.