TARDIS
From Jenny Everywhere Wiki
TARDISes were advanced space-time vessels which existed in multiple universes including the Third Universe.
The Doctor's TARDIS usually took the incongruous form of a blue police box. (COMIC: The Late Shift, The Curse of a Fairly Normal Halloween, Jenny's Spinach Encounter, PROSE: Ace Rules OK!) Its interior, which was bigger on the inside, included a large console room, which appeared “awash in amber and brass”. It hummed gently when in flight. (PROSE: Shifting)
A TARDIS was one of the many fantastical items one might win for managing to survive a full cotillion in the Cotillion Cavern of the Strange and Wonderful House. (PROSE: Our Strange and Wonderful House: The Cotillion Cavern)