The sleek, weighted balls feature smaller metal balls inside larger, smooth plastic balls. The smaller balls continuously tumble with each movement. There is no noise as they work, however, since it’s metal-to-plastic contact. Retailing: The balls can be used vaginally, but not anally (they could disappear up there).

Website: PipedreamProducts.com
Colors: Purple
Materials: ABS plastic, metal plating
MSRP: $$