Bottle Cap News

May 17, 2023


Clint S. Rush


Exploring CSI’s Stock Closures and Caps Portfolio

Working with a cap and closure manufacturer that has an extensive stock portfolio increases the chances that you will find closures that fit your needs, even if you have multiple products or target market segments. Being able to purchase multiple stock closures from one manufacturer also consolidates your sourcing, streamlining the entire bottling process.

At Closure Systems International (CSI), our portfolio boasts more than 90 stock caps and closures to help our customers find the perfect one to fit their needs. We also offer the ability to make custom closures suited to almost any specifications for packaging situations where stock closures simply won’t suffice.

Benefits of stock closures

Stock closures offer many potential benefits to bottlers and co-packers. To start, stock closures are typically less expensive than custom closures because they have a proven track record. Expertly engineered and tested, stock closures can be sourced more quickly since they don’t have to be developed from scratch. For example, at CSI we have nine manufacturing plants around the world that churn out high-quality stock closures around the clock for quicker production turnarounds.

Keep in mind too that just because a cap is a stock closure doesn’t mean there isn’t a certain level of customization available to help satisfy your customer demands and application requirements. At CSI, some of the stock cap customization options include PolyCycle™ post-consumer recycled (PCR) material to help meet sustainability goals, tamper-evident features, or top cap printing decoration. Closures can also be produced to color-match your brand guidelines.

Of course, CSI also offers the ability to make custom caps to fit pretty much any beverage packaging need, no matter how unique as you can see in these custom closure examples:

Csi Blog Caps Inset 3 1

What to look for in a cap and closure partner

When seeking out a new cap and closure manufacturing partner, there are several factors to look for to ensure their stock portfolio has both the breadth and depth you need. The first thing to consider is what market segments you need caps and closures for. At CSI, we manufacture closures for 11 different market segments to appeal to a wide variety of customers: automotive fluids, beer, bottled water, carbonated soft drinks, distilled spirits, food, liquid dairy, malt beverages, non-carbonated beverages, OTC pharmaceuticals, and wine.

You also need to consider how many closure diameters you need and what kind of closure materials you are looking for. At present, CSI offers 17 closure diameters ranging from 18mm to 133mm that can fit everything from single-serve bottles to wide-mouth jars. Our stock closures are also available in four different materials — Aluminum, CoPolymer, Polyethylene, and Polypropylene — to meet your exact application criteria. All of our stock closures also have the option to be made with PolyCycle PCR to help our customers meet their sustainability goals.

Beyond just the cap itself, you also need to consider your container finish to ensure that a stock closure will thread and seal properly. CSI’s stock caps are compatible with nearly 70 bottle finishes and can be used with eight different kinds of packaging materials:

  • Cartons
  • Glass Non-Returnable Bottles
  • Glass Returnable Bottles
  • Hdpe
  • Hdpe Non-Returnable Bottles
  • Pet Non-Returnable Bottles
  • Pet Returnable Bottles

Finally, when choosing a stock closure, consider your application fill process since not all caps can withstand each type of fill process. That’s the reason why CSI offers stock caps that are compatible with 10 popular fill processes:

  • Hot Fill
  • Hot Fill with Pasteurization
  • Retort
  • Cold Fill
  • Cold Fill with Nitrogen Pressure
  • Ambient Fill
  • Ambient Fill with Nitrogen Pressure
  • Aseptic Fill
  • Carbonated
  • Extended Shelf Life

Ready to find your perfect stock closure offered by CSI? Check out our Capfinder tool, which provides an easy way to browse, sort, and compare the more than 90+ stock closures we offer. To make to most of your Capfinder search, see this guide. If you’re ready to get started on a pricing quote for a specific stock closure or want to learn more about custom closures, reach out to our customer service team here.



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