Yasutomo
Waterbrush

The brush with a water or color reservoir! Fill with water and use half pans in the field easier than ever before. Fill with Hydrus or any other brand of watercolor mixed in water and you can sketch and paint with a brand new freedom. The small, medium, and large brushes all hold 7 ml of water, and the mini holds 5 1/2 ml of water. Available in a variety of tip sizes.