This coaster features American rock-and-roller Bruce Springstein. Multi-functional little art pieces make great gifts, and are a great size (and price) for buyers. • Transparent yellow glass, printed in black glass enamel • 4" square, with rubber bumpons on bottom • Dishwasher safe • Handmade in the USA Coasters are screen printed, fused glass. Glass is cut, and screen printed by hand with fine glass enamels, then fused overnight to 1415 degrees in a kiln.