A local tobacco store has PG for humidors, would it be okay to vape? Don't want to get hubby the wrong stuff. Does PG also have a USP rating for it? Or is pure PG enough? They had 8 oz for about $7 and CVS has 6 oz of Glycerin for $5. Now to get some flavoring to put in it with some nic juice and we'll be set for awhile. Just thought I would ask you guys about the PG situation, since I looked and went through 8 pages of results and couldn't find what I was looking for, so if this was talked about somewhere I apologize. I really don't want to resort to getting a GALLON of PG from the tractor supple co which would be a lot longer of a drive then the smoke shop in town. What do you guys think? Is the PG they use for humidors the same thing? 