Here are some pictures of three things that I added to my milk jugs to try to make it easier to transplant the plants without too much stress on their roots. I folded one end of a cardboard toilet paper roll to make a bottom. I also cut paper towel rolls to match the size of the toilet paper rolls and folded them. I added soil to the bottom of the jug, added 10 rolls, added soil in and around the rolls, then watered thoroughly and added seeds to each one.
In this second one, I used cardboard egg cartons cut in half and trimmed to fit. I added soil to the bottom of the jug, then added the 6 pk egg crate, then added soil, water, and seeds. I centered the egg carton so that I could also put seeds on both sides of it. I hope the roots have room to grow in their own area.
In this third picture, I used 2 4-pack plastic plant packs and trimmed them so that 2 would fit in the milk jug. Once again I added soil, then the plastic pack, more soil in and around the plastic pack, water, and seeds.
In the spring I will post how this worked. I will post pictures of my plants if I am lucky enough to get my seeds to grow.