Wonderful Water Brush! This Water Brush from Faber-Castell makes painting with watercolor pencils and Gelatos Colors simple! You will never need a water cup again! All it takes is 3 easy steps: just separate the top and bottom, insert the top part into water and pull the end to fill the barrel, reassemble, and begin! This makes Gelatos Colors look beautiful and works great with any water soluble medium. You will love it!