Naturally and artificially flavored. 0 calories per bottle. The Stewart's Story: In 1924, an Ohio schoolteacher named Frank Stewart set out to develop the world's best tasting root beer. With secret recipes and tall frosty mugs in hand, he soon opened his first Stewart's roadside stand. Nowadays, you can still enjoy the creamy taste of an ice-cold Stewart's root beer - served up in a classic bottle with a crown cap. And Stewart's diet root beer without all the calories. Because when we make a soda, we still follow the same time-tested principles that Frank did - brewing the authentic recipes only in small batches. After all these years, the flavor still takes you back. Pop open a Stewart's and it's then all over again! Then. Again. Since 1924. Caffeine free. drinkstewarts.com.