Juices and smoothies begin oxidizing immediately after they are made. That is why they should be consumed as soon as possible. When that isn't possible, you can "beat the system" by removing air with the Sana vacuum pitcher. Using the included pump, air is removed from the pitcher, dramatically extending the life and freshness of your juice or smoothie. The one-liter slimline vacuum pitcher is designed to fit into the refrigerator door shelf.