An Experiment:
My boss raves about her cold brew coffee. Since I like coffee, I tried to do the cold brew recipe without a special maker. As far as I could tell by looking at a "cold brew coffee maker" in a store, all the maker has is a built-in strainer for keeping the grounds out of your cup. It looked hard to clean. Anyway --
Last night I mixed coffee and water in a jar and put it in the refrigerator to brew overnight.
This morning I put a paper coffee filter in a funnel and strained the cold brew mixture into another jar. It took a long time to filter through and I had to stand there and babysit it. Then when I was lifting the filter out of the funnel, the bottom tore so some grounds went into the jar. I grabbed a fresh filter and strained the mixture a 2nd time.
Result: Yes, it tastes good. However ... although I do like coffee (as long as I add plenty of milk), I don't like cold brew coffee enough to go though all that extra work.
Back to my K machine which does all the work for me first thing in the morning while I'm still trying to wake up.