sauce boat

/S AO1 S B OW0 T/
noun
  1. 1

    A dish used to serve gravy.

  2. 2

    A source of easily obtained money or benefits.

Source: https://en.wiktionary.org/wiki/gravy%20boat, https://en.wiktionary.org/wiki/sauce%20boat, https://en.wiktionary.org/wiki/sauceboat