A batch of ulanzi can go from freshly tapped bamboo sap to a fermented, mildly alcoholic drink in as little as four or five days.
Sap tapped from young African lowland bamboo shoots during the rainy season ferments naturally within days into a sweet, faintly fizzy, low-alcohol wine reminiscent of sparkling cider. It's sold in local bars and roadside stalls across Tanzania's Southern Highlands, including around Mbeya, often straight from the collection barrel.