The term "smoothie" has been around since the early 20th century, but it wasn't until 1930 that it was used to describe a drink. Early smoothies were simply fruit, fruit juice and ice, and they were an obscure concept in the United States until the natural food craze of the '60s and '70s. During these decades, health food stores popped up around the country, and these stores often made and sold blended fruit drinks.