'Vessels' in the Bible

Then Saul said to his servant, "But, behold, if we go, what shall we bring the man? For the bread is spent in our vessels, and there is not a present to bring to the man of God. What do we have?"

David answered the priest, and said to him, "Truly, women have been kept from us about these three days. When I came out, the vessels of the young men were holy, though it was but a common journey. How much more then today shall their vessels be holy?"