1 Prepare the mold first. When you buy a refrigerator, you will usually get a mold for making ice cubes, which is a grid made of plastic. If you don't have one, you can buy one in the supermarket.

2. Then pour the cold boiled water into the ice until it is about eight minutes full. It is better to use pure water than tap water.

3. Put the ice cubes into the freezer of the refrigerator, and they will freeze into ice cubes after about 12 hours;

4. Finally, demould the ice, turn the ice upside down, and pat it gently for a few times to come out. If you can't take it out, you can put it under the tap and pat it a few times to take it out.