Let Your Creativity Flow with Our Arteza Artist Brush Pen Set. Our Empty Brush Pen’s EZ-SQUEEZE grip can be easily pressed to control the flow of moisture to the tip. This way, you can achieve beautiful effects like line variations, and harmoniously alternating gradients. You can get creative and use our watercolor blending pen set with watercolors, ink, or acrylic painting. What We Love About Our Arteza Watercolor Pens: Self-moistening with a large water reservoir. Soft and durable nylon bristles. EZ-SQUEEZE button makes water release simple to control. Our Arteza Guarantee to You. Here at Arteza, we care about our customers and we are passionate about creating products that inspire. We strive to create products that make us proud. If you have any issues, please reach out and we’ll make it right.