A Cryosleep Tank is a stasis tank that is seen throughout the Phazon Mines in Metroid Prime. These units served an unknown purpose before being modified to house Elite Pirates in cryostasis. It would appear that they are not very strong, as Elites are perfectly capable of punching right through them to attack Samus when she comes near. The Phazon Elite's tank is re-enforced with Bendezium. It is named in a scan in Dynamo Access.