Niji Waterbrush Set of 3The Niji Waterbrush is brush and water container all in one! Great for watercoloring, rubber stamping, sketching and more. Just squeeze or fill the water reservoir, screw on the brush tip, and it's ready to go! Squeeze the Waterbrush gently to wet the brush and keep it moist, eliminating the need to continually dip your brush. These features make the brush especially great for travel.