We bought green bags at Target, and they do work to keep produce nicer longer. For instance, we bought strawberries for CHEAP last week, took them out of the clamshell and put them in the bag, and they are still like new today. We don't wash them before putting them in the bag. I figure it can't be worse than the bags/clamshells most produce comes in, these are just more porous to help the gas produce naturally makes escape the bag. Or something.