Check this out. This will last a while. Compare this to what you pay for small quantities, and it's a huge savings. I saw this posted somewhere else on ecf. I looked at the MSDS, and it is USD.
1 Gallon Veg Glycerin + 1 Gallon Propylene Glycol - FREE SHIPPING
1 Gallon Veg Glycerin + 1 Gallon Propylene Glycol - FREE SHIPPING