Teleportation casket

From Tardis Wiki, the free Doctor Who reference

Teleportation caskets, also called infinity caskets and emanence caskets', (AUDIO: Rule of the Eminence) were transportation capsules, similar to transmat capsules, that teleported between destinations carrying one person. They were used by the Eminence to transport its infinite warriors and its breath of forever during its 50 year war with humanity. (AUDIO: The Seeds of War)