This is THE product for creating details on glass! Glassline pens are perfect for outlines, signatures and for creating intricate designs to warm glass projects. These fabulous pens are available in a variety of colors. 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. Your customers will love them! Glassline products are lead-free and food-safe when fired. Packaged in 2 oz bottles.