This DIY Watercolor Brush Marker from Altenew is going to give you a new way to watercolor. This empty brush can be filled with the Liquid Watercolor refills (sold separately), use one or two to create one-of-a-kind colors for your crafting projects. These brushes can also be used with water alone to use as a blending brush. They can also be filled with other coloring mediums (sold separately) for whatever purpose you choose. You will love these versatile brushes.