Ice cube trays
Ice cube trays are useful for more than ice. Use them to divide up and freeze big batches of sauces, curry pastes, and (especially) homemade baby foods. Measure the volume of the slots so you know how much is in each. We have one set of ice cube trays that hold a tablespoon in each, and another set that hold a tablespoon and a half. Make a big batch of whatever, fill the trays, freeze, and then shake them out into freezer bags so you can reuse the trays.