Do you need extra ice cubes for a party? Freeze water in clean plastic egg cartons, then transfer the ice to sandwich bags and store it in the freezer.
You won't get bubbles in your ice cubes if you use bottled, still mineral water, or if you boil tap water, cool and then freeze it.
A freezer works best when it's full, so fill up the empty spaces. Giant ice cubes, made by filling bread tins or plastic bags with water, do the job. They're great for picnics, too; just pop them into a plastic bag in the cooler.