A glass cage used to hold the captive Mayor Manx and Callie Briggs inside Dark Kat’s tuna factory hideout on Megakat Island. It could be raised and lowered at the push of a button. It was eventually used by the SWAT Kats and Feral to trap Dr. Viper’s mushroom monster, shooting it down from the ceiling while it was in its raised position, causing it to drop down onto the creature just as it was about to attack Manx and Callie, who’d earlier been removed from the cage by the Metallikats.
The cage (also referred to as a “Plexiglass Cylinder” on background art of the factory interior) is a holdover from Lance Falk’s Blowout! script. There, it is in the Megakat Forum on a ten foot platform “evoking the architecture of [Dark Kat’s] Fear Ship from show 5” capable of being launched into the air on rockets, and appears in the second act rather than the third.