Greetings,
not as easy as the clear plastic cups, but I have found that I can easily use plastic soda / pop bottles to perform the initial rootings.
I take a large quart size bottle, cut it in half with sharp kitchen shears, and have a relatively stable, clear, rooting container.
I drill a few small drainage holes, fill the container with perlite, vermiculite, some potting soil, and place my rooted cuttings
Inside (wrapped in a glass wool cube). I place either a plastic ziploc bag over the top, a longer bread bag, or, cut the plastic
soda botle so it fits inside. In the end, I end up with a mini-greenhouse, that is easy to monitor and water!