Hibiscus tea
Hibiscus tea is a herbal tea made as an infusion from crimson or deep magenta-colored calyces of the roselle (Hibiscus sabdariffa) flower. It is consumed both hot and cold and has a tart, cranberry-like flavor. The roselle hibiscus used to make the tea likely originated in Africa. In Africa, hibiscus tea is commonly sold in markets and the dried flowers can be found throughout West and East Africa. Variations on the drink are popular in West Africa and parts of Central Africa. In Senegal, bissap is known as the "national drink of Senegal". Hibiscus tea is often flavored with mint or ginger in West Africa. In Ghana it is known as "sobolo", and "zobo" in Nigeria.
Source: Wikipedia