A Chinese vase on which the Eleventh Doctor had Yowzah written as a signal to River Song. TV: The Angels Take Manhattan

A vase was a type of container.

When the Third Doctor was captured at Luigi Rossini's International Circus, Jo Grant freed him by smashing a vase over Tony, the strongman guarding him. (TV: Terror of the Autons)

When the Eleventh Doctor and Amy had difficulty landing in 1938 New York City due to time distortions caused by the Weeping Angels, they travelled back to 221 BC China. They had the word Yowzah written on a vase, knowing that it would become valuable and be collected by Julius Grayle. River Song saw the message and sent the word via her vortex manipulator, allowing the TARDIS to lock on to the "landing lights" and materialise in Grayle's house in 1938. (TV: The Angels Take Manhattan)

The Entity was imprisoned by the Eleventh Doctor in a special vase. Amy accidentally released it, but the Doctor was able to put it in the vase again. (GAME: TARDIS)

In 2597, Professor Uzua Jindah discovered a vase belonging to the long-dead Zulawy civilisation on the planet Wyzyn. (PROSE: The Monster and the Archaeologists)

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