Unique and bursting with fizzy flavor, Sioux Sarsaparilla Root Beer is a soft drink created similarly to the sweet, bubbly taste of Root Beer. In fact, Sioux Sarsaparilla is often considered "The Grandad of Root Beer." A popular drink in the days of western times, this drink was known for quenching thirst of the hot and tired cowboys. Today, it's just as sweet and trendy as it was then.