I love the idea of a reflective bandana! My rottweiler has a wardrobe of bandanas that she wears for making therapy visits. I buy regular bandanas from the army-navy store, fold them on the diagonal and then roll them up a bit so the fit snugly. I find that the bandana helps non-dog people get over the "man-eating-rottweiler" stereotype much faster. Green and purple are her best colors, and red doesn't work at all....red-headed and red-footed girls shouldn't wear red, we all know that.
Someone in one of our classes had a sort of a doggie scrunchie, with bandana fabric on elastic. It looked great, and didn't droop like a bandana. I keep meeaning to try making a few for Abby.