The Doctor's TARDIS was equipped with a jacuzzi.

In an occasion, the Seventh Doctor was in the TARDIS jacuzzi playing with a rubber duck. (PROSE: Prelude Tragedy Day)

The Thirteenth Doctor rescued people kidnapped by Zellin and Rakaya, hosting them on her TARDIS, and eventually hurried them to get out of the jacuzzi. (TV: Can You Hear Me?)

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