First they make your ice balls smell like chemically enhanced rubber. Second they don鈥檛 work even that great as it鈥檚 almost impossible to get a perfect truly solid ice ball especially one that looks clear. They recommend you use boiling water if you want a clearer nicer ball. But even that still doesn鈥檛 work. Also the balls aren鈥檛 truly that solid abd are small so they still melt fast and last maybe one short drink if you use two. If you leave them in the ice ball maker they shrivel up to half the size in a day or two and get even more chemical rubbery smelling After one use I had to stop using it. And put in the recycling. As they made my drinks taste like rubber. I have bought another ice ball maker that came with a bottle of whiskey. It鈥檚 only a single ball at a time but it鈥檚 way larger and works great the ball is much larger so it doesn鈥檛 melt easily and lasts a drink or even two (and I鈥檓 a slow drinker).