by mivanitsky on Tue Aug 25, 2009 1:09 pm
Any airtight container works, provided the coffee is kept in a cool place, not in direct sunlight or other UV light source.
I use vacuum containers (Bean Vac, but have used FoodSaver with equivalent results), and for some coffees I think that they give a bit longer lifetime (about 3-7 days), but for others, they make no difference at all. I do think that they are having an effect, since they definitely delay the usability of my lighter roasts by a few days. When I want to use a coffee soon, I allow it to outgas in a valve-bag before transferring it to a vacuum container.
If the vacuum breaks, these things are actually inferior to Mason jars or plastic airtight containers.
I suppose that the ultimate in oxidation prevention would be to use an airtight or vacuum container with an inert wine preservation gas.
-Mike