Mickey Smith kept vinegar in a cupboard by the sink in 90 Powell Tower. (TV: World War Three)
The Doctor had a cupboard in the TARDIS, where he kept various "useful" items that the cabinet in the console room had no room for. Among these were a remote-controlled car and the time path indicator. By the Doctor's second incarnation, the cupboard was full to bursting and its contents spilled over the corridor when Jamie McCrimmon opened it. (AUDIO: Daughter of the Gods)
There was a cupboard in the Celestial Omnibus. It once housed a dishwasher. (PROSE: Iris Wildthyme and the Unholy Ghost)
The Eleventh Doctor claims he was locked in a cupboard under the stairs by his uncle when he was a child, after he had been naughty. (PROSE: Horror Of The Space Snakes) Ironically, he enjoyed cupboards. (TV: A Christmas Carol)