I know it sounds too good to be true, but these things do work — I have a couple I use all the time, and talk about my experience in this review. Their secrets? A snug-fitting lid with a filter that lets just the right amount of air circulation happen, plus a plastic grate in the bottom that lets your fruit sit above any water. Oh, and all the pieces are completely dishwasher-safe.
Promising review: "I bought strawberries for my children, and then I forgot about them. I found them in the back of the refrigerator almost TWO WEEKS later, and they were still good. The real miracle is how long it keeps zucchini; again, these miracle containers have kept it fresh for close to two weeks now. I've kept cut lettuce, cut cabbage, cauliflower, broccoli, cucumbers, zucchini, sliced bell peppers, strawberries, blackberries, cut jicama, and carrots in these containers. I've had fantastic results with all of them." —Laura
Depending on the size you need, Amazon sells various options: get a set of two (one blueberry size and one lettuce size) for $19.99 or a set of three (one strawberry size and two lettuce size) for $26.99.