The Aqua Shiva is UV reactive and looks amazing under a black light! Each liquid-filled ball features a soft outer shell that serves as a flexible casing for the liquid, allowing for an easy, comfortable grip. Rather than a central metal weight like standard Astrojax, the dynamics of the Aqua's fluid flows lowers the rotational inertia of the balls to provide smooth orbits and prevent tangling of the string around the center ball. The string length is adjustable and stringbuds at each end of the string allows for quick and easy tuning. Launch date: November 26, 2007.
— “The newest generation, Astrojax is destined to become a classic toy,” Jim Marielli of Astrojax USA told TDmonthly.