Provide pressure relief and prevent bloating, paneling and leaking with our 28mm (28-400) white child resistant vented plastic cap with grooved 3-ply foam liner. This child resistant cap features ribbed sides and embossed pictorial instructions for ease of use. The 3-ply grooved foam liner remains in the cap even after the consumer opens the container to continue venting the product throughout the containers usage. The grooved foam also allows air to escape the closure whereas flat liners would normally be compressed. This vented closure features a B-style vent which combines great value, performance and sufficient venting applications. It is best suited for less aggressive formulas such as bleach, dry goods and powders.

Key Benefits:

  • Child resistant
  • Pictorial instructions embossed on cap
  • Hydrophobic & oleophobic (oil-repelling) membrane
  • Foam liner remains in the closure to continue providing venting throughout the container's usage
  • Grooves on the liner allow for air to escape whereas a flat liner would normally be compressed
  • Sustainable, economic & efficient pressure relief
  • Best vent for less aggressive formulas (ie, bleach, dry goods/powders)
  • Good airflow
  • No pierce/no glue
  • Helps prevent bloating, paneling & leaking
  • Helps extend a product's shelf life
  • Proudly Made in the USA

Membrane Specifications:

  • Membrane Material: Oleophobic ePTFE, 0.2-Micron membrane
  • Membrane Style: B-Vent
  • Membrane Thickness: 6 - 10 mils
  • Oleophobicity Rating: 8 (0 to 8: 8 is the most repellent)
  • Airflow: 0.18 ml/min @ 125pa
  • Water Entry Pressure (WEP): > 90 psi
  • Vent Patch Diameter: 0.25" (+/- 0.020")
  • Vent Holes Through Liner: 0.125"

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 165°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. The Cary Company does hereby disclaim any and all warranties, expressed or implied, including any implied warranty of merchantability or fitness for a particular purpose or use. We are not responsible for consequential damages arising from customer's selection and use of containers, container and label dimensions, and/or closures supplied by us.

Additional Information

More Information
Neck Width28 mm
Neck Finish28-400
Cap LinerVented 0.040" F-217-3 WC Grooved™ Foam Liner w/Oleophobic ePTFE, 0.2-Micron Membrane
Liner CompatibilityGlass, PE (HDPE, LDPE), PET, PP, PVC, Universal
Dimensions1.375" Dia. x 0.677" H
Pallet Pack87,500 ea. (35 Cases)
Case Dimensions24" L x 15" W x 11" H
Pallet Dimensions48" L x 40" W x 90" H
Country of ManufactureUnited States
Note:Vented caps can be specific to application. We recommend requesting a sample of this cap to test compatibility with your application.
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’s the purpose of pictorial child resistant caps?
"Pictorial" child resistant caps, also known as PICT caps, help reduce the risk of children accessing potentially harmful or hazardous products. These child resistant caps have embossed or debossed pictorial directions on the top of the cap that provide visual instructions on how to open the cap.
What industries use this pictorial child resistant cap?
In the highly regulated pharmaceutical market, reliable child resistant closures are essential. These caps are also ideal for automotive, household chemicals, nutraceuticals, and pharmaceutical industries.
Can I use a shrink band with this pictorial child resistant cap?
Yes, shrink bands are compatible with pictorial child resistant caps. Please note that these child resistant caps require a larger shrink band.
How do the vents on these caps work?
Once the liner is adhered to the bottle, the small vent in the liner allows for gases to filter out underneath the cap
What is the benefit to a vented cap as opposed to a cap with a standard liner?
The vent helps the container to "breathe" while also preventing bloating, paneling, and leaking. Without a "vent", heat induction liners provide an airtight seal.
What type of applications are recommended with vented caps?
It is recommended to be used with less aggressive formulas such as bleach, dry goods, or powders. If you are not sure if this is the right cap for you, you are welcome to request a sample. This form can be found here
Is it possible to still experiencing bloating/paneling or leaking after using a “vented” liner?
Yes, it is possible. It may that your bottle needs to be fluorinated. Reach out to our sales team for more information. Click here for more details on Fluorination.
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