Mouthwash would probably be way cheaper than vanilla extract. Wait, no I didn't advise that, did I? But Peppermint extract (assuming it really is 90 percent alchohol)? Hey 190 proof peppermint snapps sounds kinda cool, and I'm old enough to go to a liquor store. But "research chemicals" aren't sold at the grocery store, but they are very much the real deal. And Dr. Shulgin is in the hospital with pneumonia, pray for him.