Coumarin is one of the most flavored aroma enhancer for tobacco by enthusiasts for many decades. It has a sweet scent that reminds you of newly mown hay. This is because of this scent that is also used as aroma enhancer for many wine products. It adds richness to the tobacco and makes it more enjoyable to smoke. As an e-cigarette user, you would not want to miss the great aroma that pipe tobacco users enjoy. Thankfully, our coumarin pipe tobacco e-liquid captures that exact aroma of Coumarin pipe tobacco. Every vape will surely make you want more. Try it!