Keep their cock caged and plugged with the Master Series Asylum 6 Ring Locking Chastity Cage.
Made of stainless steel for hygiene and safety. Features removable urethral plug.
Cage: 6 inches in total length, 1.3 inches in diameter
Urethral spout: 2.75 inches in length, 0.25 inches in diameter
Ring: 2 inches in diameter