I took the advice of another reviewer and bought small container.  First time used I was very surprise of how easy and well it covered bald spot in back of head.  Stayed on for 2-3 days and not messy.  Wish I had found sooner instead of wasting a lot of time trying to cover up back, bald line.  UPDATE:  FORGET THE SPRAY.  It is hard to use, sprayer sticks and substance not good.  Plain air spray just as good, if not better