Received these moulds yesterday and immediately had to try them. First off, the instructions are useless, the way it鈥檚 described you fill the bottom mould with water up to the rim & then place the top mould on top which which will push the water up. Not true, I had to add additional water through the tiny holes once the top mould was in place as there is not enough water to form a round ice ball. Once I did that, they formed ok except with a round ring around the ice ball. Other than that it serves the purpose, the moulds are sturdy & bendable so the ice balls easily pop out once they are frozen. Will keep it as they look different than the usual ice cubes.