I have used Bunjii ponytail holders on the ends of my braids for the past year.  They add a bit of color with a bit of sophistication when they have the glass bead or metal tubes.  They have recently added sterling silver to their line.  The silver cordhubs are of a different design and hold the cord even better than the original ABS plastic.  They are closing out the ABS connector and currently have them listed for half price on their web page.  If you wear your hair in braids or ponytails, I'd suggest checking out their web site at www.bunjii.com