Then shalt thou break the bottle in the sight of the men that go with thee,
Then shalt thou break the bottle - a symbolical action, explained in Jeremiah 19:11.
In the sight of the men - the elders of the people and of the priests (Jeremiah 19:1; cf. the similar symbolical action of the stone bound to the Book of Prophecies and cast into the Euphrates, as a sign of Babylon's sinking to rise no more, Jeremiah 51:63-64).