1, plastic wrap: put some water in a fresh-keeping bag, tie it up with a rope, and put it in a water-saving bag. Fill it up in turn, then put it in the refrigerator and freeze it. Just break the bag when you use it.

2, jelly box: use the eaten jelly shell, clean it again, then add water and put it in the frozen layer of the refrigerator.

3, beverage bottle cap: beverage bottle cap filled with water can also make good ice cubes in the freezer.

4, biscuit plastic boxes: many biscuit plastic boxes are divided into pieces, clean them, and then fill them with water and put them in the refrigerator.