I bought a 34-pack at office max when I had rward points, so didn't pay a thing for them. I have used the red one several times already and love how the markings just iron off. However, I have found that the ink in the pen does not last very long as the red one that I have been using seems to be getting rather hard to see an is running out of ink. Even if the marks do reappear after they get cold, you can always wither put the quilt in the dryer or iron and the markings will disappear.