Study the picture that Agnes posted. A newspaper pot is basically a piece of newspaper about 12” X 7” or there about. Fold it down an inch or so so that you have a sturdier lip for the top of the container. Wrap it around a spice jar, larger pill bottle or a large sized vitamin bottle. Leave about a 1.5” extended at the bottom so that you can twist it and moosh it flat (sort of flat). Slide the jar/bottle out and you have a little pot. The paper size will vary depending on the jar/bottle. You’ll have to put the filled pots close together in a tray so they don’t fall over (due to the not so flat bottoms). They dry out faster than other containers. By transplanting time, they are ready to fall apart and are easy to tear a bit for the roots to grow.
For those who do not subscribe to newspapers and want to make newspaper pots...bring home the newsprint flyers handed out at stores. A lot of places have free publications printed on newsprint as well. All of this will work.
Those newspaper pots:
Are those pots going to hold up with seed starting mix inside them and sitting in a tray which I keep about an inch of water in? Won’t they collapse sitting in an inch of water?