"Jar" (Japanese: ポッド Poddo "Pod" or ポット Potto "Pot") in Japanese, are a series of mostly low-Level Flip Effect Monsters that help the controller and/or the opponent gain field and hand advantage. Because of their disruptive effects, almost half of them have been Forbidden.
Most of the members of this series have a single eye and/or a large grin as a distinguishing feature.