This is a painting depicting a man intently focused on a glass bulb he's drinking from using a straw. The scene is bathed in a dramatic chiaroscuro, with strong contrasts between light and shadow. The man is leaning over a stone ledge, his face illuminated by an unseen light source. He's dressed in a simple, light-colored coat with a high collar and his hair is pulled back into a small ponytail. His expression is one of concentration as he sips from the glass bulb using a long straw. To the right of the man, partially obscured in shadow, is a head, possibly a sculpture or a bust, wearing a dark cap. A small bowl containing a brush sits on the ledge to the left of the man. The background is dark and undefined, emphasizing the figures and the immediate scene. The painting has a strong sense of realism and a focus on the details of the man's expression and the textures of the objects.