Clamshell boxes have become a cornerstone of modern packaging, providing both security and product visibility across numerous industries. Whether used for electronics, hardware, food, or retail goods, these hinged containers deliver versatility and reliability for manufacturers, retailers, and consumers. The United States is home to some of the world’s most innovative and dependable clamshell box manufacturers, each offering unique strengths and capabilities. This comprehensive guide explores the top clamshell box manufacturers in the United States​, highlighting their specialties, manufacturing processes, and what distinguishes them in a competitive market. Guruieco, known for its advanced R&D and commitment to sustainability, is featured first in this list.