Non-plastics storage suggestions

I agree with Paul on this one. Glass, freezable containers are your best bet. I like to use the smaller glass bowls that Pyrex puts out. (just search for "freezer safe glass food storage") They are a good size for 1-2+ portions, and come with flexible air tight lids. Perfect for freezing or refrigerating. Just check the label to make sure you are picking out a glass container that can handle freezing. As an added bonus, glass containers are great to microwave in, as the glass is virtually inert, and does not impart any weird flavors(or chemicals) to the food.

if you are planning on continuing to freeze, yet want to make single-serving portions, i would recommend a vacuum bag system, like this one, which is what i use: http://tinyurl.com/4ygotv9. it's a bit of an expense up front, but it will pay for itself in the long run easily. i now make batches of things, freeze them in portions, then seal them with this and they last AGES.

EDIT: i just realized that your question specified NON-plastic solutions, but i took it to mean you mean non-plastic storage containers. the bags used for these are quite food-safe, as far as i know. i apologize if it's not exactly what you are looking for. but it really works well, and avoids the dangers you read about with a canning solution.

It is difficult to find ways of sealing things and avoiding plastic. A hundred years ago, many things you bought were sealed with a layer of butter, lard, or something worse. There really is very little alternative, especially since food expands on freezing and would crack a layer of "sealing fat" as it expanded.

You can get portion control by putting food into small plastic bags. You freeze those in plastic containers, so they turn into appropriately shaped slabs. When the food is frozen you take them out of the containers and stack the solid slabs in the freezer.

Pyrex makes glass storage containers in a variety of sizes that should freeze fine. They have plastic lids though. Remember not to overfill as frozen liquids expands and can break glass.

why non-plastic? You don't state your objections to the material (or rather a large range of materials).

If it's just the size of your current containers, there exist many smaller ones that are food safe and can be used in a freezer. For example I usually save up icecream containers when I buy icecream at the supermarket. That's 1 liter (about a quart) size, freezer and food safe (of course) plastic buckets or boxes with a decent lid seal. Ideal size for your purpose I think.

If you don't want plastic at all, you can always go the old way of using old newspapers and aluminum foil. Wrap the food in foil, wrap the whole package in an old newspaper, and put that in the freezer. Looks messy as hell, but works. That's how we used to freeze fresh fish and meat way back when (or even without the aluminum foil, but in hindsight that might have caused some ink to leech into the meat, not that nice).