Child Resistant Closures
In the highly regulated pharmaceutical market, reliable child resistant closures are essential. These child resistant closures safely secure your product while ensuring compliance with rigorous protocol testing to meet Consumer Product Safety Commission (CPSC) standards. These caps are ideal for Automotive, Household Chemicals, Nutraceuticals, and Pharmaceutical industries.

Cap Top Design Options

"Pictorial" directions embossed on the top surface of the cap.

PDT - Embossed "Push Down & Turn"
"Push Down & Turn" directions embossed on the top surface of the cap.

Liner Options

These liners are sized to fit industry standard 33mm neck finishes. Due to the variation in neck finish dimensions, particularly with glass bottles, we recommend testing the compatibility of liners with your bottle/cap combination. To request samples, please click here.

Foam Liner (F-217® .035" 3-Ply Co-extruded Foam Liner)
F217 liners are made of three layers: a thin soft polyethylene foam core sandwiched between two clear layers of LDPE film. F217 has become the industry standard due to its all purpose compatibility, resilient, compressible seal, cleanliness (no pulp dust) and economy. F217 liners are taste and odor resistant, and have a low moisture transmission rate, meaning they prevent moisture from entering the bottle and affecting products. F217 is a brand-name and tends to be used interchangeably with foam liner. However, F217 actually performs better than a regular foam liner. This liner does not create an airtight seal.
F-217® .035" Foam Liner Data Sheet

Pressure Sensitive Liner (PS-22 .020" Polystyrene Foam Liner - Printed)
Imprinted with "Sealed for Your Protection" in Black.
Structurally similar to a foam liner, pressure sensitive liners have adhesive on one side, designed to stick on to the rim of a container. When a container is closed and pressure is applied to the cap (and in turn, the liner), the adhesive becomes activated, which creates a seal. Pressure sensitive liners provide an extra level of protection in that it actually creates a seal that sticks to the rim of the bottle. Pressure seals are not considered a form of tamper evident seal. They do not work well with liquids, especially oils. They can, at times, work with thick liquids such as creams and sauces.
PS22 .020" Pressure Seal Liner Data Sheet

Heat Induction Seal (HIS) Liners - 2 Piece
Induction liners are a popular choice when a tamper evident air tight seal is needed. It also works well with liquid products. HIS liners are available with either a Pulp (paper) or Foam (polyethylene) backing that remain with the cap. "Tamper Indicating" or "Welded Seal" liners provide a tamper-evident bond to the container and are noticeable if removed. The "Clean Peel" liners provide an aggressive bond with clean peel removal but are not tamper-evident. An induction machine is required to apply the liner. Printed liners are imprinted with "Sealed for Your Protection" in Black.
For PE, Pulp, Tamper Indicating, Printed - FoilSeal™ .020" Pulp FS M-1 Liner Data Sheet
For PE, Foam, Tamper Indicating - Tri-Gard™ II TS PE .035 PL Liner Data Sheet
For PP, Foam, Tamper Indicating - Tri-Gard™ II TS PP .035 PL Liner Data Sheet
For PE/PP, Foam, Clean Peel - FoilSeal™ .030" C25P FS 1-15 Liner Data Sheet
For PET/PVC, Pulp, Clean Peel, Printed - FoilSeal™ .020" Pulp FS 3-19 Liner Data Sheet
For PET/PVC, Foam, Clean Peel - FoilSeal™ .035" C25P FS 3-19 Liner Data Sheet

The Proof is in the Packaging

Need additional resources to guarantee that your products aren’t being tampered with? Familiarize yourself with Tamper-Proof vs Tamper-Evident Packaging; does one of these promise the impossible? Explore What Is Considered a Tamper-Evident Container and Why They Matter for a better understanding of the characteristics of a tamper-evident container. When in doubt, consult our Guide to Types of Tamper Evident Packaging or 5 Tamper-Evident Packaging Examples for Enhanced Product Security to discover the kinds of tamper-evident packaging available for all industries.


Polypropylene PlasticPolypropylene (PP) is a tough plastic that has excellent chemical resistance. PP is translucent in its natural state but can have a glossy finish when produced with color. Some examples of common products made with PP are dairy and medication containers. Polypropylene is suitable for hot fill applications of up to 205°F and is therefore great for autoclaving. It is not recommended for cold or sub-freezing temperatures. The Cary Company has an assortment of polypropylene plastics available for purchase, such as plastic caps and jars, which have a higher tolerance for chemical products. Discover if Polypropylene is appropriate for hot fill application by learning more about What Is Hot Fill Packaging and how it applies to Polypropylene containers.


This information has been provided as a general guide. It is the customer's responsibility to select the proper container for product and application compatibility.

Additional Information

More Information
Neck Width33 mm
Neck Finish33-400
Cap LinerConfigurable
FDA CompliantYes
Dimensions1.545" x 0.667" (39.243 x 16.942 mm) - Outside
Case Pack2,000 ea.
Pallet Pack30 Cases (per skid)
Case Weight28 lbs.
Case Dimensions23.06" x 15" x 10.04"
IndustriesAutomotive, Household Chemicals, Nutraceuticals, Pharmaceutical
Country of ManufactureUnited States
Note:**Click "Product Specifications" to view Liner Specifications.
Q & A
Customer Questions
Can you ship internationally? Where are you located?
The Cary Company online ordering platform is only set up to ship within the United States. For international shipments, please contact us at 630.629.6600 or Sales@thecarycompany.com, and we will be happy to process your order. Our main warehouse and office are located in Addison, Ill. We also have warehouses in across the United States that you can see here. Thank you for choosing The Cary Company.
What are my options for custom built child resistant caps?
Customizable options for these caps include choosing cap top design, color, and liner type.
Can any of these caps match with any container material?
No. Each cap liner is designed to be compatible with specific container materials.
How does customizing these caps work?
Please view the three required categories and select the option from each drop-down list.
Are these custom build caps available to sample?
Yes! You may request a sample of any of these caps here.
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