Martha Sleeper created some of the most stunning, detailed, and exceptional bakelite jewelry. Sleeper clearly had fun while designing! Sleeper was a well-known actress when she launched her second career as a jewelry designer. Her business grew quickly, and she received a lot of press and attention for her whimsical designs. After World War II, Sleeper relocated to Puerto Rico, where she opened a fashion boutique and designed fabrics for bathing suits and dresses.