The audio titled "Unfilled Vessel" begins with the sound of an empty plastic cup being placed on a hard surface. The sound echoes, emphasizing the emptiness of the cup. Then, there's a hollow, sucking sound, as if someone is trying to drink from it using a straw. The struggle to draw any liquid from the empty vessel is palpable. The futile suctioning noise reverberates, breaking the silence again and again. The audio is a stark reminder of the futility of trying to draw from an unfilled or empty source.