Hi Ors,

I don't know, but they sure are nice and clean... I doubt they can go bad.

Making your own firestarter can be lots of fun... I liked a recent post in which the member suggested to coat CB/PJ with wax to make them less of a mess. That being said, I must admit that I bought a Spark Lite with 8 Tinder Qwik pieces and I love it. It came in a small orange reusable plastic box. I don't think i'm going to mess around with CB/PJ anymore.