Tumblers handcrafted of glass with gold details  Each holds 11.75 ounces  Set of 4  Hand wash; do not microwave Imported About Jonathan Adler: Potter, designer, and author Jonathan Adler launched his namesake brand after leaving his day job to pursue his first love: pottery. Today his offerings span furniture, lighting, home décor, and more plus countless iconic interior projects—and over 25 stores—all dedicated to bringing Modern American Glamour to your life.