https://www.britannica.com/topic/kava
https://en.wikipedia.org/wiki/Kombucha
https://www.forbes.com/sites/christinatroitino/2017/02/01/kombucha-101-demystifying-the-past-present-and-future-of-the-fermented-tea-drink/
https://slate.com/culture/2009/09/and-the-most-liberal-product-in-america-is.html