Pyrovile pod
From Tardis Wiki, the free Doctor Who reference
The Pyrovile Pod was an escape pod made of rock, made by the Pyroviles.
The surviving Pyroviles from Pyrovillia were grinded into dust inside the pod. The pod later became a control center for Vesuvius.
The Doctor and Donna Noble entered the pod, and triggered the eruption. The pod was tough enough to withstand the power of volcano, and the Doctor and Donna survived the eruption. (DW: The Fires of Pompeii)
The design of the pod is later reused and slightly modified to make the Sontaran Ship seen in The Last Sontaran.
