1. Adding ice cubes to wine or drink will make the drink cool and keep the temperature of the drink at about 0 degrees Celsius, so this drink will make people fondle it. Moreover, the ice cubes in the wine will reflect the color of the wine, which will improve a lot of grades at once. These ice cubes need to be free of impurities, cracks and bubbles.

2. Boil it first, then put it at room temperature, and then put it in the freezer for cold storage. The container at this time should be a fresh-keeping box. The purpose of boiling is to expel air from the water. If the water can't be poured in, leave it 2-3 cm, and then wrap it in a thermal insulation bag or towel, which can slow down the freezing time of water and allow bubbles to escape from the water more fully. Then when everything is frozen, take out the fresh-keeping box, melt it a little, pour it on the chopping board, and slowly split it in two with the tip of the lower edge of the knife until it is cut into your favorite size. You can keep the big one and cut it when necessary.