I bought some of those small ziplock containers to measure my food in, they are about the same size as the gerber jars of food, it is nice too because you just take out the 2 containers that you will use and go on your way
we also use the take and toss to freeze in. that is the main way we do it but we do use the ice cube trays on occasion and serve 4 cubes as an equivalent to one standard jar.
HTH,
Angie