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This product is a 28mm plastic tamper-evident screw cap for PET bottle packaging of bottled mineral water, purified water, and certain beverages. The cap is made of food-grade PP and comes with a standard tamper-evident tear band; once opened, the tear band separates from the bottle, making it easy for end consumers to identify whether the product has been previously opened. Bottled water factories typically match and search for caps by Neck Finish standard when purchasing. This product covers the two most common 28mm neck finish standards in the industry, PCO 1810 and PCO 1881, and can be directly matched to the customer's existing preform molds or blow-molding equipment without the need to redevelop the neck structure.
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READ MORELile (Taizhou) Technology Co., Ltd manufactures 28mm tamper-evident screw caps for PET bottled water and beverage packaging, covering the two most widely used neck finish standards in the industry, PCO 1810 and PCO 1881. For bottled water and beverage producers, this is the cap size that most filling lines are already built around, which is why matching the correct neck finish standard matters more than matching a size number alone.
Bottled water factories rarely search for a cap by diameter alone. What actually determines fit and sealing performance is the neck finish standard stamped into the preform mold, since two 28mm caps built to different neck finish standards will not seal the same way on the same bottle. This is why we produce against PCO 1810 and PCO 1881 specifically, rather than a generic 28mm spec.
PCO 1810
Common on standard-pack mineral and purified water lines already running heavier, more established preform designs.
PCO 1881
More common on lightweighted preforms and large-volume water packs, where reducing preform material is a production priority.
Both standards are produced to match existing preform molds and blow-molding equipment directly, so switching a cap supplier does not usually require redeveloping the bottle neck.
Every cap in this range carries a standard tamper-evident tear band. Once the cap is opened, the band separates cleanly from the bottle, giving the end consumer a clear, visible signal if the product was opened before purchase. This structure is treated as a baseline requirement across the bottled water and beverage category, not an optional add-on.
Foamed liner
A common choice where a softer seal cushion is preferred against the bottle finish.
Direct-pressure seal
Relies on the cap's own sealing lip geometry rather than a separate liner insert.
Linerless direct sealing
Suited to shorter shelf-life or lower-barrier requirements, simplifying the cap structure.
Which option fits best comes down to the filling medium and required shelf life, and is confirmed with the customer before production rather than assumed by default.
A cap that fits the preform but was never checked against the filling line's actual torque and speed settings can still cause problems at the capping head. Since every cap we produce is meant to run on a live bottling line, this compatibility is confirmed as a normal part of the order, not treated as a separate engineering request.
Application torque
Set against preform spec and capping head parameters
Material formulation
Adjustable for preform crush strength and filling process
Packing quantity
Confirmed to match your storage and line loading method
Because PCO 1810 and PCO 1881 are established, universal neck finish standards, customizing this cap for your brand does not require developing a new mold. Color, logo, and printing method can be changed independently of the neck structure, which keeps OEM/ODM turnaround shorter than a fully custom cap project.
Confirm color and logo plan
Sample and printing confirmation
Mass production and delivery
Logo application can be done by embossing, in-mold labeling, pad printing, or surface printing, with the right method depending on your order volume and mold design. As a cap manufacturer working directly with bottled water and beverage producers, Lile (Taizhou) Technology Co., Ltd handles this branding step alongside the standard supply order rather than as a separate custom project.
28mm caps run at high volume on most bottled water lines, so consistent supply timing matters as much as the cap spec itself. Raw material sourcing, production, warehousing, and logistics are managed as one continuous process, with records kept from raw material through to finished cap inspection, so a batch issue can be traced and addressed quickly without disrupting your filling schedule.
How do I know if I need PCO 1810 or PCO 1881?
It depends on your existing preform mold, since the two standards are not interchangeable on the same bottle neck. Sharing your preform drawing or a physical sample lets us confirm the correct match before quoting.
Do I need to redevelop my bottle neck to switch cap suppliers?
No, as long as your preform is built to PCO 1810 or PCO 1881, our caps are produced to match these standard neck finishes directly without new mold development on the neck itself.
Which liner option should I choose?
This depends on your filling medium and required shelf life. We review this with you and recommend a foamed liner, direct-pressure seal, or linerless structure based on those factors.
Can you match our brand color and print our logo?
Yes. Pantone color matching is supported, and logo application can be done through embossing, in-mold labeling, pad printing, or surface printing depending on your order volume.
Will the cap be checked against our filling line's torque settings?
Yes, target application torque is confirmed against your preform specification and capping head parameters before mass production begins.
Is there a minimum order quantity?
MOQ depends on your color, logo, and packaging requirements, so it is confirmed once those details are set rather than fixed as one number for all orders.
Can I get samples before placing a bulk order?
Yes, samples and small-batch trial orders are available, with lead time confirmed based on your specific color, logo, and liner requirements.