For a loooong time, I've been wanting to figure out an alternative way to store the bulk coffee we brew at World Fare. However, with such tight margins all the time, we haven't been able to afford one way valve containers and I didn't want to use disposable vacuum seal methods. We've been re-using and re-using one pound bags that one of our volunteers brought in, but the zip-lock seals have been coming apart, which sort of defeats the purpose of the one-way valve bag. They've started to look pretty crummy, especially when they're held closed with paper clips.
But...TODAY I finally found a solution that I could make with items we have on hand. (Rob says he came up with it before, but I just wasn't in the right brain space to hear it then.) I took jars that we'd purchased some time ago from Global Infusion and, after cleaning them thoroughly, drilled small holes in the lids. I then cut out the one-way valves from the coffee bags we've been using and taped them inside the lids. Voila!
Thanks to this web page for the idea! (And also Rob. :)