Select options CBD (Cannabidiol) Extract FECO (RSO) – 1ml – 5ml $60.00 – $250.00Rated 5.00 out of 5FECO / Full Extract Cannabis Oil. FlowerChild Herbal products start as a whole plant extract. We take the flowers and leaves of the plant and extract the compounds using food grade alcohol. The alcohol is then cooked off, leaving a rich, black oil filled with the essence of the plant. All of the terpenes, flavonoids, and healing compounds are retained for optimal potency. We use this pure CBD extract to make our other CBD products.