You definitely won't be using an entire can of pumpkin puree in one shake, so we recommend transferring the remainder to an airtight container, storing it in the fridge, and using it within 5-7 days. If you won't use the entire can in 5-7 days, you could also measure out tablespoons of pumpkin puree and store them in a Ziploc bag in the freezer or put them in ice tray containers. Then simply pop two of the pre-measured amounts into the blender and blend.