Hiya,
I recommended a Vacuum jar from Vacuvin before...just to update, I imploded 2 of them(Big crack through the lid) before realizing the lid is too wide to take a vacuum. The vacuum pump does not have a relief valve when the pressure is right like the wine capper from this company....But they make container for 'Cereal' that has a smaller far stronger lid that will take a vacuum nicely....So don't bother with the one of the left, the container on the right is much better. You'll fit 4 bags in it(squashing them down into it).
http://www.amazon.com/Vacu-Vin-Saver-Cereal-Liter/dp/B000XRAI3O (http://www.amazon.com/Vacu-Vin-Saver-Cereal-Liter/dp/B000XRAI3O)
(http://i679.photobucket.com/albums/vv152/magnethead123/c72e75fb-00e2-4dbd-aea0-ba095379e3a1_zpsaa31c7de.jpg)