The romaine lettuce in the photo above is 15 days old. Before we went on vacation, I threw a whole head of romaine into a ClearlyFresh bag and left it to fend for itself. When I returned, I washed and chopped the lettuce so it would be ready to go for sandwiches and salads. I'm amazed that this romaine is over two weeks old and it still tastes as good as the day I bought it.
As produce ripens it releases carbon dioxide gas. The key to successful produce storage involves letting out the carbon dioxide but not letting in too much oxygen. You want your produce to breathe, but it doesn't need to have enough oxygen to run a marathon (that would only accelerate the journey to slimy and unusable.) The ClearlyFresh bags use a BreatheWay membrane that regulates this gas exchange and allows just enough oxygen in so your produce can stay fresh.
These bags come ten to a package and run about $4. You can order them here. I think these bags will come in really handy during the holiday season. You can pick up your fresh produce the week before and stay out of the grocery store the week of Thanksgiving/Christmas/Hanukkah/Solstice. Cheers!