The Revolutionary Onan Cap Toy is one of the more uniquely shaped masturbator sleeves available in Japan. The disk-like toy slots onto your member like a bottle cap. You then squeeze and massage the soft materials as firmly as you like. The inner lining of awesomely large nubs will grip and grind your head as you rub the toy over and over you.
Ostensibly designed at the "National Onaho Laboratory" by cute researcher Airi Fujisaki, the Revolutionary Onan Cap Toy is ideal for use with both hands and really giving yourself a thorough piston-like tug.
The Revolutionary Onan Cap Toy features: