Hibiscus extract was a drink on Hughes Island, consumed by the Iromish tribe during festivities. Considering the artificiality of the rest of the tribe, the name was probably chosen for its tropical theme, and not due to any actual connection to the Hibiscus flower. It proved to be an incredibly potent source of alcohol.
It was present at the celebratory feast marking the arrival of James Zanasiu Jr, Malte Kerzach, and Florence Brennan to the village. The Chief made Florence and Malte drink it, stating it as his favorite drink. The drink got Malte drunk after a single mug.