What is a one-sentence summary of the following article?
If you want to store the puree for a longer period, freezing it is a great option. Use a silicone ice cube tray to make it easier to pop out the puree once it’s frozen. Each ice cube tray makes about 1 ounce (28 g) of baby food, which is about how much your baby will eat at once. Pop the covered ice cube trays into the freezer, making sure to keep them level so the puree doesn’t get frozen to the covering. Leave them alone for 2-3 hours or overnight to ensure they’re completely frozen through. Try sticking a toothpick into a puree cube. If it easily pushes into the center, the puree is still soft. If it can’t penetrate the puree, chances are it is completely frozen. As long as your freezer stays at 0 °F (−18 °C), the puree should technically be good indefinitely, but the flavor of the puree will decline over time.

Summary:
Pour the puree into ice cube trays to freeze baby-sized portions. Freeze the ice cube trays for several hours. Use frozen puree within 3-6 months of freezing it for the best quality.