Electric Rice Cooker

The Electric Rice Cooker is, on the surface, nothing more than a common kitchen appliance. However, it gained legendary significance when it was used as the containment vessel for the Evil Containment Wave, a sealing technique designed to trap powerful evil beings. By affixing a special ofuda talisman to the cooker's lid, the vessel becomes capable of holding even the most dangerous demons indefinitely.

Master Mutaito first employed this method against King Piccolo, sacrificing his own life to perform the Evil Containment Wave and seal the Demon King inside a rice cooker. Master Roshi then threw the sealed container into the depths of the ocean, where King Piccolo remained imprisoned for hundreds of years. The centuries-long imprisonment ended when Emperor Pilaf discovered the cooker and freed King Piccolo, hoping to use the Demon King to achieve his own ambitions of world domination.

Failed Attempts at Re-Sealing

After King Piccolo was freed, both Master Roshi and Tien Shinhan attempted to use the Evil Containment Wave with new rice cookers to seal him again. Both attempts failed. Roshi's wave missed the cooker entirely, and Tien's cooker was destroyed before the technique could be completed. King Piccolo displayed visible terror whenever a rice cooker was brought before him, knowing full well the centuries of imprisonment it represented.

The Evil Containment Wave technique returned in Dragon Ball Super during the conflict with Zamasu, though by that point other containers were used. The rice cooker remains the most iconic vessel associated with the technique and serves as a humorous reminder that even the most mundane objects can play pivotal roles in the Dragon Ball universe.