Some of the things I buy at Sam's Club are the GIANT boxes of cereal. They have 2 individual bags inside. I save the largest box or use a plastic cereal box that I can fit the bag into. As long as the cereal is stored in a cool, dry place it keeps very well, plus we eat a lot of cereal. For example Kellogg's Raisin Bran Cereal, 76.5 oz. is $9.98 which they say is $0.13/oz. Compare that to those other sizes.