Glassline pens are perfect for outlines, signatures and for creating intricate designs to warm glass projects. Available in a variety of colors, Glassline pens are exactly what you have been looking for! Easy to use and water based, the color may be applied directly from the bottle, dabbed on with a sponge or painted with a brush. Glassline products are lead-free and food-safe when fired. Packaged in 2 oz bottles.