Quality is typical of most cheap stuff from China
It filters like most metallic screen filters--It does a good job of keeping the coarse coffee grounds out of the cup but leaves a little sludge on the bottom. One of the cups had the steel mesh protruding from the side of the molded plastic and a piece of it broke-off in my finger. It is very fine steel, smaller than a needle, but I was able to pull it out of my finger with tweezers. I also used a steel knife to scrape off the remaining protruding mesh.
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