Product review (4 stars): Makes the water taste better.
A water filter. If I were shorter, this would be hard to change, because it's in the back right upper corner of the refrigerator. These are a little difficult to change as you have to twist it with some force. These filters do make the water taste better. One important step - After you change the filter, run one or two quarts/liters of water through the system. If you don't do that you will get grey ice and water