All, So I took one of those degassing valves apart because I wanted to copy them so to speak. Really still not sure how they work. Anyone? It almost seems like you could just poke the tiniest hole in a lid/bag and have the same results. I'm interested in using the valved bags to see if it makes a difference in storing roasted beans. I seem to get this funk smell from keeping them sealed in mason jars(I use the plastic lids, not the metal rings/bands). I was contemplating putting a pin hole in a plastic lid but not really sure how to test it. How long do you de-gass your beans before sealing them tightly in a container? Ron Connect and share in new ways with Windows Live.