Hibiscus flowers are well known for their beauty and tantalize the taste buds when brewed into a piquant, tea-like beverage. Due to its tart taste, it is also known as sour tea and is made with a mixture of dried hibiscus flowers, leaves, and dark red calyces. (Cup-shaped centers of the flowers). Calyces are the main ingredients in hibiscus herbal drinks. This beverage is known by different names depending on where it is brewed and consumed as both hot and cold drinks.