Characteristics of a Screen Bowl:

1. Anti-Clogging: The screen prevents the smoking material from clogging the pipe's tube, keeping the water pipe clear and clean.

2. Ease of Cleaning: As the smoking material is separated by the screen, cleaning the water pipe becomes more convenient, as users don't have to clean deep into the tube each time.

3. Enhanced Smoking Experience: The screen helps to disperse the smoke, allowing for a more even filtration through the water, potentially leading to a smoother smoking experience.

4. Reduction of Waste: Using a screen bowl can reduce waste of smoking materials, as any uneaten residue is caught by the screen and does not go directly into the water.