Portola Packaging, Inc: Linerless closure for aseptic beverage packages

Designed for low- and high-acid aseptic beverage packages, Steri-Shield™ from Portola Packaging, Inc. is a linerless, compression-molded plug closure made from a proprietary resin blend that includes high-density polyethylene resin.

Pw 2264 Webportola4
The plug design mates with the bottle finish inner surface to create an effective seal. The lightweight closure does not fail (stress crack, back-off, etc.) during the sterilization and/or distribution process.  The structure withstands an aseptic sterilization environment of up to 140 degrees Fahrenheit.  The closure is easy for consumers to open because there is no liner to negatively impact torque.  Can be made in a variety of sizes ranging from 38 to 43mm, with or without a tamper-evident band.  The cap is suitable for a variety of aseptically-filled beverages including: juices, isotonics, dairy, energy drinks, milk, vitamin waters, drinkable yogurt, teas and others.
Fill out the form below to request more information about Portola Packaging, Inc: Linerless closure for aseptic beverage packages
Don't miss Packaging Recycling Summit 2026
Where innovation meets sustainability. Join the leading forum for packaging recycling professionals, featuring cutting-edge solutions, expert insights, and the connections you need to advance the circular economy. Secure your spot today.
Discover More
Don't miss Packaging Recycling Summit 2026
Need help with your packaging project?
We’ve done the legwork to identify and vet experienced packaging and processing consultants you can contact directly for your next project. Decades of combined experience in packaging line engineering, machinery selection, package and materials development, and food processing operations.
See your advisor options now.
Need help with your packaging project?