To Store: Store homemade pumpkin puree in an airtight container in the refrigerator for up to 7 days.
To Freeze: Store in an airtight container in the freezer for up to 3-4 months. I recommend freezing your pumpkin in 1-cup portions, so you can defrost and use only what you need.
If your pumpkin puree is very moist, you can place it in a paper-towel-lined bowl or strainer to drain some of the moisture before baking. This is especially recommended if you're planning to make Pumpkin Pie with your puree.