Those who love the deep, earthy, spicy flavors of Sarsaparilla will enjoy this sweet version from Reading Soda Works. Sarsaparilla soda pop from Reading Soda Works gets a thumbs of from the locals who have enjoyed the recipe since 1921. Now, anyone with a taste for the retro soda pop recipe can enjoy. Crafted using fine ingredients and pure cane sugar, Reading Soda Works Sarsaparilla is gluten-free and caffeine-free and comes in a retro inspired glass bottle with a steam engine on the label.