Talens Ecoline Liquid Watercolor 30ml Primary set of 5 contains highly concentrated dyes for intense yet transparent color. A spacious opening allows you to work straight from the bottle using a brush or dip pen. The bottle cap is also fitted with a handy pipette so you can easily measure out drops for mixing. The fast-drying colors can be rewet and blended. Easily adjust color intensity by diluting Ecoline with water. These liquid watercolors are great for painting, drawing, graphic design, illustration, lettering, and more. For best results, use Ecoline on white or light-colored papers and boards.