Purchased last June, 63 pieces remaining. According to my acupuncturist, a veteran with over 30 years of experience and booked solid eight days in advance, even opened moxibustion sticks can be reused if they get damp. He suggests putting a desiccant, like those found in senbei (rice cracker) packages, in the can with them. He also mentioned that older moxibustion sticks can be better. I am selling these because I am concerned about the smell of the smoke.