What makes these cups "Upcycled"? Often in the glassmaking process there can be wasted material- leftover color, terminations of patterns, etc. What else better to do with these scraps that would be tossed, than to recycle them and give them a better purpose?! Hence the name Upcycled. We are helping the environment and making beautiful glassware at the same time! I love the challenge of trying to create and save these cool patterns. The melted discs of colorful glass are heated in a kiln, hot fused to the bottom of a clear bubble, and then further formed into a drinking glass. There are never two alike and the sizes always vary based on the size of the patterned disc. What a great little item to collect and a great conversation piece at the table. Best of all, you will always know whose drink is whose!