Knowledge


The Ultimate Guide to PET Bottle Neck Finishes, Thread Sizes & Dimensions
July 27, 2026
Frequently asked questions
Can I use any cap on a bottle with the same neck diameter?
No. The neck diameter and thread finish must both match. For example, a 28-410 cap will not fit a 28-1881 bottle.
What industries use PET bottles?
PET bottles are widely used in food and beverage, pharmaceuticals, nutraceuticals, cosmetics, personal care, household chemicals, automotive products, and industrial packaging.
What is the difference between 28-1810 and 28-1881?
Both are carbonated beverage finishes, but the 28-1881 is a lighter-weight design developed to reduce plastic usage while maintaining pressure performance.
Can Aarex Solutions manufacture custom bottles?
Yes. We offer custom bottle design, mold development, colour matching, and manufacturing services tailored to your product and production requirements.
Why are neck dimensions so important?
Accurate neck dimensions ensure proper sealing, prevent leaks, improve filling-line performance, and maintain compatibility with closures.
Where can I learn more about Aarex Solutions?
You can explore other sections of this website, such as the "About Us" page or our Sustainability blogs, to learn more about our company, mission, and team.
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+1.77898.AAREX (22739)
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