I am very impressed with how well these work! Yes, they are not perfect. However, for the price and ease of use, and how little room they take up in the freezer (I bought a mold that makes 3 large square cubes a while back and it has a huge outer styrofoam “box” to contain the mold. They cubes turn out beautifully but in the end I rarely use it because it takes up too much space in the freezer), they are great for everyday use! In the first batch I made, some of them separated in the middle when the ice expansion pushed the top and bottom parts apart, therefore creating a ring around the ice ball as you can see in the pic. I think if you make sure the surfaces connecting the top and bottom are dry before you fill with water using the funnel, then they will turn out much nicer. I also love that there is a fill line that shows you exactly how much water to put in so it doesn’t over flow cause any overflow would cause the ice to form in the neck on the top making it much more difficult to remove from the mold.P.S. I am an obsessive compulsive researcher before I buy anything. I bought this on my iPad when I was away from home, after having spent hours researching these things, as I hate to buy crap and just have it end up in a landfill. After I got home, I checked the listing using my laptop, which has fake guard installed to check how genuine reviews are and was surprised to see this product got an F. That’s what prompted me to write this review. Hopefully, more people will find this wonderful product that I find really cool. I paid full price on Amazon for this and have not been contacted by the manufacturer or received any discount or promotion.Very cute and fun to make ice balls. Instructions say to wait (let them sit out) for 2 minutes to remove frozen balls -- but it's more like 5. And the caps pop off in the freezer. Be gentle or water squeezes out the middle between plastic and silicone as you are putting cap on, and when putting in freezer.my husband loves them for everything, not just alcohol drinks... super easy to get ice ball out, just don't overfill, use the limit line... GREAT BUY!The best large cube maker I found. Had to reorder 3 times for extras and friends!!Fun to use and pretend that I’m a real bartender at home !I’ve been on the search for ice ball molds. These are the best I found. While they not perfectly smooth, clear ice balls—they do the trick. Super easy to fill. Easy to get ice out. Easy to clean.I’d buy these again.Cap falls off easily. and forgot about water expansion so it burst almost burst open. But good idea. will useI love the look of the ice balls & I being able to add fruit.