i still hang out clothes. sorry this is not a sewing answer, but this is what i use. i like to reduce, reuse, recycle, a plastic javex jug (etc). just cut a piece out of the handle down low so it will slip over the clothesline. on opposite side cut out half moon shape from the ridge up. punch a few holes in the bottom in case it rains, so it will drain. i take mine in.
i use the slide on clothes pins and they will stand up on the side, also your line dividers will fit on there too.
if this is not appropriate, please remove. thanks