Well, the Food and Drug Administration says propylene glycol, one of the chemicals used in the manufacture of your car's engine coolant is, well, cool to eat and drink, too. At least in small doses.

Dow Launches Bio-Circular and Circular Propylene Glycol Solutions in North America. Renuva™ and Ecolibrium™ technologies enable two new offerings for a wide range of propylene glycol applications ...