Like everyone else, I’ve been aware that kombucha is a Thing. I vaguely knew it was fermented tea, and that much like kefir, which I’ve made, it’s fermented by a SCOBY: a live, Symbiotic Colony Of Bacteria and Yeast. “Symbiotic” because they rely on each other: the yeast eats the sugar and puts out carbon dioxide and ethyl alcohol; then the bacteria eats the alcohol and puts out amino acids and trace vitamins and minerals.
Because of all those beneficial bacteria, it’s probiotic. I wanted to try making it, and as it happens, UncommonGoods sells this handy kit, which includes everything you need to make kombucha except for tea, sugar, and water.