These Healthy Harvest Freshness Extenders combine a cool concept with hard science to extend the life of your produce by up to a week. I found these at Fancy Food show last year and had to get them for the shop. Using the same concept as grocery stores, these "eggs" help extend the life of produce by naturally absorbing the ethylene gas that is slowly ripening and spoiling your fruits and veggies. Save hundreds of dollars a year and enjoy Mother Nature a little longer! Each egg lasts 3 months.