Well my friend's father owns a cafe in our neighborhood. We regularly go there after-hours to jam, hang out, homework etc, and we make our own drinks. The other day we were in the back storage area and I noticed a few gallon-sized jugs of flavoring, and inspected them out of curiosity. They were different flavoring liquids made from a company called "Flavor and Fragrance Specialties", and the only ingredient outside of 'natural and artificial flavoring' was PG. Vapable? Dangerous? Worth a shot?