No blender: press the pomegranate halves in a lever citrus press and stop before you squeeze the peel, or crush the arils in a sealed freezer bag with a rolling pin and pour the juice through a sieve. One large pomegranate gives about 2/3 cup (150 to 180 ml) of juice, depending on the variety. Keeps up to 3 days in a closed glass jar in the fridge, or 3 months frozen in ice cube trays. Wear an apron: pomegranate juice stains. For adults, use prosecco instead of sparkling water. Nutrition is for the juice only, without the fizz.