the other thing you can do, is to get freezer bags and a few plastic containers. freeze the food in the plastic container, lined with the freezer bag, then remove the frozen food (in bag) from the container - makes it easier to stack, and you don't need so many plastic containers.

You may want to have a look at food storage - thinking of vacola preserving. I know you can sterilise the glass jars in a low oven.