This drink will impress your guests definitely. Cocktail Chemistry shows us, how to do it and this you need a soldering iron. Jupp, you read it right, really a soldering iron! The ice ball to make is not magic, but we need for this cocktail no solid ball of ice, but a, the inside is hollow, so that we can give the pure cocktail there. The ice ball does one, by having a ball water just long enough in the refrigerator, to outside the mold is hard and inside the water is still liquid. If you have this condition, comes the soldering iron for use, with which to burn a hole in the ice, to the water suck then with a syringe. Now you can enter the hollow ball of ice until use in the freezer… Have fun with friends!