The Extra Life Fruit and Veggie Keeper makes fruits and vegetables stay fresh longer in your refrigerator. Simply place it in the vegetable bin and the Extra Life Veggie Keeper neutralizes ethylene gas, the gas that vegetables and fruits emit when ripening. When in a confined space like a refrigerator crisper bin, ethylene gas gets trapped and accelerates ripening. The Extra Life Veggie Keeper will add several days of life to your fruits and vegetables. Inside the Extra Life disk is a breathable pouch which contains natural zeolite pellets that have been coated with a 6 percent solution of potassium permanganate. This formula has been used commercially in the produce industry for more than fifty years and is scientifically proven to oxidize 97 percent of the ethylene gas that is released by fruits and vegetables as they ripen in a refrigerator. The ethylene is chemically attracted to the potassium permanganate and is converted to harmless water vapor and carbon dioxide. Active for up to 3 months.