Pentel Flat Tip Reservoir Brush The water reservoir brush is perfect for water-based or water-based materials. It also works perfectly with distress scrapbooking inks. Nylon bristle brush. Ideal for use with watercolours, pencils, crayons and markers. Clean, easy to use and doesn't leak. Ideal for watercolourists, illustrators, cartoonists, graphic designers... and for works with degraded or washed effects. This brush contains a water reservoir which makes it very comfortable to work with. By squeezing the reservoir, the water reaches the bristles, thus making it unnecessary to carry a water container. Flat tip. Brand: Pentel