Brand name of Wham-O Flying Discs. Wham-O was bought out by Krans-Co which was in turn bought out by Mattel. Mattel "frisbee" products aren't used by the vast majority of serious players of disc golf or ultimate. Discraft and Innova Champion are most popular among golfers. The Discraft Ultrastar is the disc of choice for Ultimate. In fact, many of the frisbee brand golf discs are manufactured by Innova for Mattel.