Stun cube

A stun cube was a piece of technology that could incapacitate and contain a full sized human. Karvanista used a stun cube to capture Dan Lewis, in Liverpool, 2021 during Halloween. As it was Lupar technology, the Thirteenth Doctor was able to detect traces of the cube in Dan's house on 37 Granger Street and use that to locate Dan. (TV: The Halloween Apocalypse)