Kuretake Clean Color Real Brushes have actual hair brush tips in a disposable form that will give you clean, water-based color on the go. The colors can be blended like watercolors in a palette when used with a water brush. Six colors available. Not refillable.
I love the brush tip on these pens. Portable as markers, and the color is water
soluble so I can create shading either from the ink on the page or from the tip
of the brush with a waterbrush. I can create color variations with a touch of
the black to dirty up the pure shades. More colors please, I'm hooked!