The design is made on a curved glass surface using the 3D black outliner. Once dry, the inset areas of the design are filled with the free-flowing glass colors through the bottle nozzles. After the artwork is complete, the wine glasses are filled with molten gel wax taking care not to submerge the candle wicks. You learn how to paint designs on a curved glass surface using outliner and glass colors. This will give you the confidence to test your artistic skills on other glass articles. You also learn how to fill the containers with gel wax. By doing so you get hands-on experience on this Art and Craft activity. Not only have you gained proficiency here, but you have also made some very useful candles in your own design. When lit the glass colors emit a beautiful aura. The pretty wine glasses can be lit up for any festive or special occasion. The best part about them is that the glass-painted candles can be reused by filling them again with gel wax.