We don't know if it was a marketing genius or a crazy man who came up with the Hoppe's 9 Air Freshener. Whoever it was should be given a medal or some such adornment. The Hoppe's 9 Air Freshener is truly the only Very Serious air freshener we could find. Everything else smells like flowers, trees, fruit or a baby's behind. In 1903, when Frank Hoppe developed a mix of 9 different ingredients to create the original Hoppe's No. 9 gun solvent, he had no idea that some nut was going to make a Hoppe's 9 Air Freshener. I mean really, who does that? But, over the last 107 years the smell of Hoppe's No. 9 has evoked fond memories of fathers, grandfathers, memorable hunts and great days in the field. So Very Serious now sells an air freshener with the unique No. 9 smell. The Hoppe's 9 Air Freshener even has a handy string for hanging it in your gun room, car, garage, or anywhere you want the nostalgic smell of Hoppe's No. 9 (at no extra charge). A 2008 book, "The Art of Manliness," by Brett and Kay McKay, lists Hoppe's No. 9 gun solvent as one of its "Top 15 Manly Smells," along with hardware stores, gunpowder, Scotch whisky, campfires and barbershops. Hoppe's No.9 Air Freshener is the scent that has carved its way into our sporting psyches through the deer camps, dens and hunting lodges of America for more than 107 years.