Closure Systems International - CSI

How your packaging closure is applied shapes everything that follows—from product protection and shelf appeal to the consumer’s first impression.

The CSI Capper Portfolio handles the full range of closures modern production lines demand: screw-on, ROPP, press-on, roll-on, snap, flip-top, T-cork, and child-resistant closures in sizes up to 110 mm.

For more than 90 years, CSI has been a trusted global partner in high-quality closures and capping equipment. Whatever your product requires or consumers demand, CSI cappers apply every closure with consistent, repeatable torque to specification.

Learn more: bit.ly/3Uichop

The real challenge on a high-speed packaging production line is not simply running faster. It is running at speed with zero compromise.

The CSI Capper Portfolio is engineered to deliver both speed and performance. Throughput at industry leading rates up to 50 caps per head per minute and engineered for precision at every range.

Torque accuracy and seal integrity remain consistent at full speed, based on your application specifications. Magnetic clutch headsets deliver reliable, repeatable application, while an independent headset drive with a modular speed unit provides more precise, scalable control.

If you’re in the market for capping equipment for precise application and tight tolerances, learn more: bit.ly/3Uichop

A CSD packaging line and an OTC packaging line face very different challenges. Your capping equipment should meet each on its own terms.

That’s why CSI reengineered its capping equipment portfolio market segment by market segment. Our dedicated capper models serve alcoholic beverages; carbonated soft drinks and water; personal care and cosmetics; household and automotive chemicals; pharmaceuticals and nutraceuticals; and wide-diameter foods and condiments.

For non-carbonated beverages, our capping machine options support dairy, extended shelf-life, aseptic, and hot-fill applications.

Whatever your market, CSI has a capper purpose-built for it.

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This Labor Day, we're taking a moment to recognize the people behind every closure that leaves our plants.

From our operators and technicians to our engineers and quality teams, CSI runs on the dedication of our team members across our manufacturing sites worldwide. Every cap, every seal, every innovation starts with the work you do every day.

To our CSI team and to hardworking people everywhere — thank you. Enjoy the holiday!

No two packaging production lines are exactly alike. That’s why CSI purpose-built its Capper Portfolio lineup: nine specialized models, each engineered for your market—from the 100-AB for alcoholic beverages to the 900-HF for hot-fill applications.

Every capping machine is available in freestanding or turret configurations to align with your exact closure, neck finish, fill type, and line-speed requirements.

Meet the CSI capping equipment lineup: bit.ly/3Uichop

For most manufacturers, a stock closure is the right starting point.

Stock closures are pre-engineered, commercially proven, and ready to run. CSI offers more than 90 options across 11 market segments in 17 diameters. Customization including PCR materials, tamper-evident features, color matching, and top cap printing can all be applied to stock caps.

Custom closures make sense when the application genuinely demands a non-standard bottle finish, specialized fill process, or unique consumer experience through the closure's look or feel. The investment is higher, but so is the design flexibility and customer appeal.

When in doubt, start with a stock portfolio closure. Chances are the right cap is already there.

The distinction between one-piece and two-piece closures comes down to one component: the liner. Consumers rarely notice the difference.

One-piece closures are a single molded cap with no separate liner. They are lightweight, cost-effective, and a more sustainable choice due to reduced material use.

Two-piece closures pair a plastic shell with a liner, typically EVA, adding sealing performance for applications that require higher leak protection, barrier performance, or extended shelf life.

Not a one-size-fits-all decision. The right choice depends on fill process, product chemistry, and performance specs.

EPR legislation is reshaping packaging decisions across North America and closures are not exempt.

Recyclability, recycled content, and material circularity are transitioning from voluntary commitments to compliance requirements. The practical questions brand owners face: Does my closure support a recyclable package? Can it incorporate post-consumer recycled content without compromising performance or food contact compliance?

CSI's PolyCycle® addresses both. Closures are manufactured using post-consumer recycled resin in both PE and PP, through a “closure-to-closure” model in which recycled bottle caps become new, food-safe caps. In fact, most stock closures are available with up to 100% PCR content.

Performance and circularity blend perfectly with PolyCycle.

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Child-resistant (CR) closures exist for a straightforward reason: to make certain products significantly harder for young children to open while remaining manageable for adults.

In the U.S., the Consumer Product Safety Commission governs CR packaging under the Poison Prevention Packaging Act. Mandatory categories include prescription and OTC pharmaceuticals, pesticides, and certain household chemicals. The standard is precise: difficult enough for children under five, manageable for adults. Compliance documentation is required.

For OTC and nutraceutical brands, child-resistance, line performance, and sustainability all have to work together. CSI's Defender-Lok™ is a next-generation CR closure engineered to deliver all three.

Learn more: bit.ly/4xlx1cZ

Consumer confidence starts before the product is ever opened.

Tamper-evident (TE) closures are designed to signal clearly — visually and audibly — whether a package has been accessed prior to purchase. In many categories, they're not optional. They're a regulatory requirement.

Common TE formats include the snap ring familiar on water and carbonated beverage bottles, foil seals bonded to the underside of the cap, welded membranes with pull rings common in dairy and juice, and combination systems that layer multiple features for pharmaceutical and nutraceutical applications.

Regulatory requirements for TE packaging vary by product category and jurisdiction. In the U.S., both the FDA and CPSC have relevant guidelines depending on product type.

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