DOVE PRODUCTS-Dove Blender Starter Set. The Dove Blending Pen is a revolutionary new tool specially formulated to make floating or blending colors easier. Fill it with the included Blending Medium and use it on any water-based marker, colored pencil, chalk, dye pad, or pigment pads to achieve more variation and depth without using many colors. The pen is refillable and the nib is replaceable should it ever become worn. Complete package contents include one Blending Pen, one 1oz bottle of Blending Medium, and three replacement nibs. Made in USA.