The Purus One creates flawlessly clear Ice Slugs that can be used with the Icebirg Pro to form perfectly spherical Ice Balls. Until now this has only been possible by purchasing expensive equipment or suffering through the time, mess and inconsistency of manual methods. The Purus does it easily and consistently with very little fuss or mess. In addition at no point does any plastic, silicone, or composite come in contact with the water or ice while freezing, only the highest grade of stainless steel, for the absolute lowest flavor pollution possible. Perfect for any scotch, whiskey or craft cocktail connoisseur.