I have made 2 batches now using this mold, It does make decent Ice Balls but is a bit messy because ut's hard to fill the mold without water running into the outer well of the mold. I give it 3 stars because it will work.
https://www.amazon.com/gp/product/B00H8W54EK/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1