Lori Schiersmann, the creator and designer of Tin Cup Art Glassware,  works with a Metallic Ceramic Paste.  Each piece of glass, ceramic or porcelain, is hand designed and painted on freehand, then baked to evaporate any excess moisture, therefore fusing the paste onto the glass. Guaranteed Dishwasher AND Microwave Safe.  From everyday usage to special gifts, this artist creates one-of-a-kind art for all ages. From My table to Yours, Extrodinary,Everyday”.  More details on www.tincupart.com