Hi 71GTO,
I use similar containers as you to put rooted cuttings in.
I repotted 3 today into larger containers, I had no problems.
The plastic can be carefullu cut or just torn down along one side.
I gently got the plant(s) out with some little root distubance as possible, and repotted. they have shown not signs of stress from the operation, no wilting of leaves or anything. they look the same as they did before being repotted, only now in larger container.
Grant
z6b