What is the defect of being an upside-down vessel?

There are three defects of a faulty vessel, which are used as analogies for how one should listen to the Dharma. 

The first defect is to be an upside-down vessel: if a bowl or cup is upside down, no matter how much water or liquid you pour into it, not a drop of it will will remain in the vessel. 

And this is an analogy  for someone who is at a Dharma teaching, but does not listen, does not direct their mind to what is being said. 

His Holiness, 17th Gyalwang Karmapa

Ogyen Trinley Dorje

From teaching on Torch of Certainty
by Jamgon Lodro Thaye 

at 31st Kagyu Monlam

Session 3