Please note this blog is no longer updated. (Click here to find my new blog address).
We came up with this trick since we have an ice maker and no ice cube trays. It actually works great and you can freeze in the perfect amount, about a 1/4 cup. Just fill silicone baking cups with desired amount and freeze. Then pop them out and into a freezer bag. We use it for yogurt for smoothies, juices for smoothies, chicken and veggie stock, and pesto.
What else would it work well for? See the commets for more ideas.