Closure Systems Inc
Graphic DesignIndiana, United States2-10 Employees
Closure Systems International (CSI) is a global supplier of plastic and aluminum bottle caps and closures, paired with high-speed capping equipment and technical service and training support. The company is based in Indianapolis, Indiana, and operates with a relatively small team. It serves customers worldwide, providing integrated closure solutions for bottling operations. Its recent product development has included a lightweight closure for PET bottles, aseptic beverage closures such as Asepti-Lok 47 38mm, and a Defender-Lok platform for child-resistant packaging in OTC and nutraceutical markets. In May 2026, CSI expanded its manufacturing footprint by acquiring Amcor's two manufacturing plants in the United States, broadening its North American operations.