Whirlpool P1FB6S1 Fresh Flow Produce Preserver Starter Kit Use in any refrigerator crisper Helps keep produce fresher, longer Keep Fresh packets absorb ethylene gas emitted by many fruits and vegetables, causing them to over ripen By removing ethylene, the produce preserver helps extend freshness. Based on commonly purchased produce Replace Keep Fresh packets every 6 months with item W10346771A Contents include 1 Holder, 2 Keep Fresh packets (6 month supply) and 1 Status Indicator