Prison Egg (IDW)

The Prison Egg, is an object mentioned in the Sonic the Hedgehog comic series and its spin-offs published by IDW Publishing. It is a type of storage cage used by the Eggman Empire to hold prisoners.

Past
According to Mimic, he was once trapped inside a Prison Egg but managed to escape it later.

Trivia

 * The Prison Egg is based on the Capsule that debuted in the original Sonic the Hedgehog.