What Closure Systems International does

Closure Systems International (CSI) is a privately held global manufacturer of plastic and aluminum bottle caps and closures, headquartered in Indianapolis, Indiana, with operations dating back nearly a century. The company produces more than 50 billion closures annually across 11 manufacturing facilities in the United States, Mexico, Costa Rica, China, and Japan, serving primary end markets in carbonated soft drinks, bottled water, beer, distilled spirits, wine, non-carbonated beverages, and liquid dairy, with secondary exposure to food, automotive fluids, and OTC pharmaceutical/nutraceutical packaging. CSI's product portfolio spans 90+ stock closure designs organized into branded product lines including Aqua-Lok, Double-Lok, Omni-Lok, Defender-Lok CRC, Sports-Lok, Nitro-Lok, Xtra-Lok, EZ-Lok, Euro-Lok, Extra-Lok, Wing-Lok, Econo-Lok, DS-Lok, and AS-Lok, supported by a proprietary CapFinder online search tool.

The company's underlying technology stack centers on precision compression molding and injection molding of HDPE and polypropylene resins, with proprietary innovations including patented Double-Lok and Bead Behind the Wing tamper band designs, HR and XT liner technologies for CO2 retention under thermal cycling, lightweighted "mini" closure architectures achieving 20–40% weight reduction, and the PolyCycle post-consumer recycled (PCR) resin program. CSI operates an integrated "total packaging solution" model that combines closure manufacturing with proprietary capping equipment (built at its Crawfordsville Machinery Division), technical services, line audits, and validation support, which it monetizes primarily through quote-based unit pricing on closure hardware, equipment sales, and aftermarket spare parts and services. Go-to-market is anchored in enterprise field sales via regional offices in North America, Japan, and Mexico/Central America, complemented by a global distributor network for small-quantity customers and the CSI Closures.biz e-commerce portal for order tracking and direct ordering.

The business is privately held with no parent company, public ticker, or disclosed institutional investors identified in available sources; ownership and revenue figures are not publicly disclosed. FSSC-22000 certified manufacturing, clean-room capable production, and active membership in the U.S. Plastics Pact, Sustainable Packaging Coalition, and Association of Plastic Recyclers underpin regulatory and ESG positioning across beverage and pharmaceutical customer segments.

Name

Closure Systems International

Legal name

Closure Systems International Inc.

Website

https://csiclosures.com

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Closure Systems International (CSI) is a privately held global manufacturer of plastic and aluminum closures and capping equipment, producing 50+ billion units annually across 11 facilities for beverage, food, automotive, and OTC pharmaceutical packaging customers.

Ownership category

akta.pro rank

Product category

Packaging Manufacturing

NAICS

Packaging Machinery Manufacturing (333993), Metal Crown, Closure, and Other Metal Stamping (except Automotive) (332119)

SIC

Special Industry Machinery (No Metalworking Machinery) (3550), General Industrial Machinery & Equipment (3560)

akta.pro primary industry

Closures & Dispensing for Rigid Plastic (Caps, Pumps, Sprayers, Droppers) (IMALAAAJ)

akta.pro secondary industries

Capping, Sealing & Closing Machines (IMAHAOAG), Plastic Caps, Closures & Dispensing Systems Manufacturing (IMANAEAB), Custom Closures & Closure Decoration (Coloring, Printing, Metallization) (IMALALAO)

Keywords

• Bottle closure manufacturing
• Capping equipment
• Tamper-evident closures
• Child-resistant closures
• Beverage packaging

Headquarters

HQ city

Indianapolis

HQ country

United States

HQ region

North America

Offices12 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Infrastructure, Technology or R&D, Personnel

Revenue model

1. Closure Manufacturing and Sales: CSI manufactures and sells plastic and aluminum closures for beverages, food, automotive fluids, OTC pharmaceuticals, and nutraceuticals. The company produces 50+ billion closures annually across its global manufacturing network, serving major beverage brands worldwide.
2. Capping Equipment Sales and Services: CSI builds capping equipment for high-speed, high-performance production lines and provides spare parts, technical support, and line audits. The company offers total capping solutions including capping machines, headsets, chucks, and application engineering.
3. Custom Closure Design: CSI partners with customers to create custom closures that differentiate brands, add consumer appeal, and optimize total cost of operations
4. Technical Services and Validation: CSI provides on-site technical service, line audits, and commercialization support from spec alignment to validation runs

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Closure Systems International manufactures and sells plastic and aluminum bottle caps and closures, along with high-speed capping equipment and application engineering services, for the beverage, food, pharmaceutical, nutraceutical, and automotive fluid packaging industries. The company produces 50+ billion closures annually across a global manufacturing network of 11 facilities and complements its closures with proprietary capping machines, headsets, chucks, and technical services.

Product overview

Closure Systems International (CSI) is a global manufacturer of plastic and aluminum bottle caps and closures serving the beverage, food, pharmaceutical, and automotive industries. The company operates a platform-based model offering 90+ stock closures across multiple product lines (Aqua-Lok, Double-Lok, Omni-Lok, Defender-Lok™ CRC, Sports-Lok, Nitro-Lok, Wing-Lok, Euro-Lok, Extra-Lok, Xtra-Lok, EZ-Lok, Econo-Lok, DS-Lok, AS-Lok, and food/automotive closures). These core products are complemented by the PolyCycle® PCR sustainability program and the CapFinder online product search platform. CSI also provides capping equipment and technical services including custom closure design. Recent additions include the Defender-Lok™ CRC line for OTC/nutraceuticals (launched 2025) and the Omni mini XP 26mm lightweight closure (October 2025).

Differentiator

Problem solved

Functional benefit

Brands

• PolyCycle: Proprietary post-consumer recycled (PCR) material program for sustainable closures
• Defender-Lok
• Capfinder

Products and services

• Aqua-Lok Line of tamper-evident plastic closures for bottled water applications, available in 26mm and 28mm sizes including lightweight mini variants using advanced HDPE polymers for weight savings. Designed for bottled water producers and co-packers.
• Double-Lok Patented tamper band closures for carbonated soft drinks providing the highest level of tamper evidence available in the CSD industry, with visual and audio cues on opening. Available in 28mm and 38mm sizes.
• Omni-Lok Best-selling line of caps for carbonated soft drinks with linerless design for sparkling beverages, including the Omni mini XP 26mm lightweight closure launched in October 2025.
• Defender-Lok CRC Child-resistant, senior-friendly closure line for OTC and nutraceutical packaging with drop-in compatibility and high-speed performance. Available in 33mm, 38mm, 45mm, and 53mm sizes.
• Sports-Lok Push-pull closure providing dual tamper-evident protection on dust cap and shell tamper bands for sports beverage applications.
• Nitro-Lok Linerless cap design specifically for nitrogen-pressurized water bottles, securely sealing up to 40 PSI to preserve original product taste.
• Xtra-Lok mini S Lightweight two-piece 28mm closure for carbonated beverages with XT liner delivering maximum CO2 retention under extreme conditions and over 10% material savings.
• Euro-Lok Industry-leading tamper-evident security for carbonated beverages with two-piece lined closure, suitable for both PET and glass packaging with excellent resealability.
• Extra-Lok Patented 'Bead Behind the Wing' tamper band technology providing high level of tamper resistance with improved wing design for 100% tamper evidence on opening.
• Wing-Lok Sure-grip closure for returnable and non-returnable applications on PET or glass bottles, providing easy opening and reclosing with reliable sealing.
• Econo-Lok mini Ultra lightweight 28mm one-piece linerless closure for carbonated beverages and bottled water, weighing approximately 1.9 grams while meeting CO2 performance standards.
• DS-Lok Distilled spirits closures delivering performance, tamper evidence, and aesthetic appearance. Available in 18mm, 28mm, and 33mm sizes with smooth wall variants.
• AS-Lok Sterilization-friendly closure ideal for aseptically filled products, with standard and AM variants designed for hot cabinets/warmers at point of sale.
• PolyCycle Proprietary post-consumer recycled (PCR) content material program that can be incorporated into closures to help customers meet sustainability goals. Made from recycled content and fully recyclable.
• Capping Equipment and Services Capping equipment built for almost every type of closure application, production, and process environment. Includes cap handling machines, headsets, chucks, and comprehensive technical support including a spare parts program.
• Custom Closures Custom closure design and manufacturing partnerships to create packaging that differentiates brands, adds consumer appeal, and optimizes total cost of operations.
• Food Closures Complete line of narrow-mouth and wide-mouth plastic food closures for applications including salad dressing, BBQ sauces, edible oil, vinegar, peanut butter, mayonnaise, and coffee.
• Automotive Fluid Closures Specifically engineered automotive fluid closures with unparalleled leak-proof performance for consumers and easy application for optimal operational efficiency.

Quantifiable outcome

• Over 40% weight reduction achieved with Aqua-Lok mini LW 26mm compared to standard 26mm closure (1914 finish)
• +6 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Eight partnerships are on record, tiered major, core and minor.

• AmcormajorStrategic or Co-development PartnerAmcor sold two beverage closure compression molding facilities to CSI in May 2026. The facilities in Erie, Pennsylvania and Hattiesburg, Mississippi specialize in high-volume beverage applications including carbonated soft drinks, water, and hot-fill products. The transaction strengthens CSI's North American manufacturing footprint and aligns with Amcor's core portfolio strategy.
• U.S. Plastics PactcoreStrategic or Co-development PartnerCSI is an Activator member of the U.S. Plastics Pact, working toward circular economy goals including ensuring 100% of plastic packaging is reusable, recyclable, or compostable. Founded by The Recycling Partnership and the World Wildlife Fund, launched as part of the Ellen MacArthur Foundation's global Plastics Pact network.
• Sustainable Packaging Coalition (SPC)coreStrategic or Co-development PartnerCSI is a member of the Sustainable Packaging Coalition, which brings together stakeholders from across the packaging supply chain to catalyze actionable improvements to packaging systems and lend an authoritative voice on issues related to packaging sustainability.
• Association of Plastic Recyclers (APR)coreStrategic or Co-development PartnerCSI is a member of APR, the only North American organization focused exclusively on improving recycling for plastics. APR helps companies design packaging that can be recycled and supports innovations that overcome existing recycling challenges.
• Ellen MacArthur FoundationminorStrategic or Co-development PartnerCSI participates through its membership in the U.S. Plastics Pact, which is part of the Ellen MacArthur Foundation's global Plastics Pact network and New Plastics Economy Initiative.
• The Recycling PartnershipminorStrategic or Co-development PartnerCSI participates through its U.S. Plastics Pact membership. The Recycling Partnership co-founded the U.S. Plastics Pact along with the World Wildlife Fund.
• World Wildlife Fund (WWF)minorStrategic or Co-development PartnerCSI participates through its U.S. Plastics Pact membership. WWF co-founded the U.S. Plastics Pact along with The Recycling Partnership.
• PolyCycle Innovation, LLCcoreStrategic or Co-development PartnerPolyCycle Innovation, LLC showcases PCR (post-consumer recycled) solutions at industry events. CSI's PolyCycle PCR resin program supports sustainable packaging goals.

Scale indicators9 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• AptarGroup: Global leader in dispensing closures, child-resistant closures, and active material science solutions; directly comparable to CSI's beverage closure portfolio and the leading incumbent in the OTC/nutraceutical CRC segment where CSI is launching Defender-Lok.
• Bericap: German-headquartered global manufacturer of plastic closures and dispensing systems for beverages, food, and industrial applications; directly competes with CSI in PET beverage closures (carbonated soft drinks, water, juices) and shares a comparable global manufacturing footprint.
• Silgan White Cap: Subsidiary of Silgan Holdings specializing in metal and plastic closures for food and beverage applications; competes head-to-head with CSI in tamper-evident and specialty closures, particularly for hot-fill and aseptic beverage applications.
• O.Berk Company: U.S. specialty packaging distributor and manufacturer of stock and custom closures; directly comparable to CSI's smaller-quantity/distributor-facing business and overlaps in food and beverage closure SKUs.
• ALPLA Werke: Austrian family-owned plastic packaging manufacturer with strong beverage closure (bottles and caps) presence globally; directly competes with CSI in PET closures and increasingly in PCR/sustainable packaging formats.
• Pact Group Holdings: Australia-headquartered packaging manufacturer with significant closure and rigid plastic packaging operations serving beverage and FMCG customers; comparable to CSI in scale and vertical mix, with Asia-Pacific geographic overlap.
• Zalkin (Pneumatic Scale Angelus / BW Packaging): Leading manufacturer of capping machinery and capping equipment; directly comparable to CSI's machinery division (Crawfordsville) in supplying high-speed capping solutions to beverage and food customers.

Broad incumbents

• Crown Holdings: Global metal packaging giant with significant beverage closure and can end businesses; overlaps with CSI on aluminum closures and metal caps for beverage applications but operates at much broader scale across cans, aerosols, and food cans.
• Berry Global (now part of Amcor): Post-merger Amcor/Berry is a diversified packaging giant with substantial plastic closure operations; competes with CSI in beverage and food closures and was the counterparty in CSI's 2026 facility acquisition from Amcor.
• Rexam (Ball Corporation closures business): Ball Corporation inherited a substantial beverage closure business through Rexam; competes with CSI in plastic and aluminum beverage closures globally as part of a broader metal and aerosol packaging portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/closuresystemsinternational
• LinkedInlinkedin.com/company/csi-closure-system-international
• Xx.com/csiclosures

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Closure Systems International