I kept seeing this advertised at Peet’s Coffee.  The Cold Brew Fog.  Did some middle of the night research when the baby is nursing and I’m getting to the end of the internet.

According to this article, it was a bit of an accident.  Cold Brew blended so you get this foamy top that sort of settles down.  Like the San Francisco fog.  No added milk, though you can get it as a latte (which I did the first time because I don’t like black iced coffee).  But with the blended goodness, it’s creamy.  Whatever it is, it’s delicious.