PRODUCT
28mm and 30mm Metal Screw Thread Aluminum Caps for Olive Oil Glass Bottles
Upgrade your culinary oil packaging lines with high-performance metal screw thread aluminum caps available in versatile 28mm and 30mm dimensions. Engineered specifically for glass olive oil and vinegar bottles, these closures feature precision internal sealing liners and tamper-evident safety bands to guarantee zero leakage, long-term freshness, and superior brand presentation.
28mm and 30mm Metal Screw Thread Aluminum Caps for Olive Oil Glass Bottles
Protect the purity and flavor of your extra virgin olive oils and specialty vinegars with precision-engineered 28mm and 30mm metal screw thread aluminum caps. Tailored specifically for standard commercial glass containers, these ROPP metal closures combine a durable aluminum shell with high-performance internal sealing liners, delivering airtight preservation, tamper-evident security, and superior shelf distinction.
Key Features & Benefits
● Versatile 28mm & 30mm Size Options
Manufactured in popular 28mm and 30mm neck finish sizes to fit standard commercial glass olive oil bottles perfectly across automated capping lines.
● Pilfer-Proof Tamper-Evident Safety Band
Equipped with a lower breakaway ring that detaches visibly upon initial opening, offering consumers immediate and uncompromised proof of original factory sealing.
● Hermetic Leak-Proof Sealing Barrier
Fitted with food-safe internal sealing liners that form an airtight shield against oxygen, moisture, and liquid leakage during global transit and shelf storage.
● Durable 100% Recyclable Aluminum Construction
Crafted from high-purity aluminum alloy, offering an eco-friendly, corrosion-resistant, and robust alternative to traditional plastic closures.
● Customizable Aesthetic Finishes & Branding
Available in custom Pantone colors with advanced decoration options including silk screen printing, hot foil stamping, UV coating, and embossing.
Technical Specifications
| Parameter | Specification Details |
| Product Type | Metal Screw Thread Aluminum Cap / ROPP Closure |
| Material | High-Purity Food-Grade Aluminum Alloy |
| Available Sizes | 28mm, 30mm (Custom dimensions available on request) |
| Closure Type | Screw-On with Tamper-Evident Safety Ring |
| Industrial Use | Extra Virgin Olive Oil, Edible Vegetable Oil, Culinary Vinegar, Syrups |
| Target Bottles | Standard Screw-Neck Glass Containers (Marasca, Dorica, Square Profile) |
| Special Feature | Metal screw thread, Pilfer-proof, Leak-proof, Eco-friendly |
| Surface Finishing | Matte/Glossy Coating, Silk Screen Printing, Hot Foil Stamping |
Applications
Designed for commercial bottling plants, agricultural estates, and food packaging enterprises:
● Extra Virgin Olive Oil & Cold-Pressed Specialty Vegetable Oils
● Organic Apple Cider Vinegar & Aged Balsamic Vinegar Glass Containers
● Gourmet Infused Cooking Oils, Salad Dressings, and Marinades
● Artisanal Liquid Condiments, Sauces, and Specialty Culinary Liquids
Customization & OEM/ODM Services
We provide comprehensive supply chain and manufacturing support tailored to your requirements:
● Custom Pantone color matching for metallic outer shells
● High-precision top logo embossing and side skirt printing for clear brand distinction
● Technical compatibility verification with standard automated capping machinery
● Free samples dispatched for factory calibration, seal integrity, and line testing
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31.5 × 24 mm · Compact format
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31.5 × 44 mm · Extended format |
CLOSURE FORMATS
Choose the cap around your bottle.
Cap appearance, neck fit and pouring performance need to work together. The dimensions below identify the available cap formats; they do not replace a bottle-neck drawing or a fit test.
| Nominal cap format | Configuration | Selection notes |
|---|---|---|
| 31.5 × 24 mm | Compact body | Short profile; confirm the compatible insert and bottle finish. |
| 31.5 × 44 mm | Extended body | Taller exterior profile; confirm capping clearance. |
| 33 × 44 mm | Premium format | 180° rolled-edge configuration shown in the technical reference. |
| 33 × 52 mm | Premium extended format | Non-rolled-edge configuration; height adjustment subject to drawing approval. |
Dimensions are nominal cap diameter × height. Different formats may require different bottle finishes and internal assemblies.
OPENING & POURING
Specify the function inside the cap.
Tamper-evident openingA breakable opening feature provides visible evidence of first opening. Confirm the band or ring design on the selected assembly and evaluate opening performance on the actual bottle. Pourer insertAn internal pouring component guides the oil stream. Request sample testing with your oil to assess flow, residual dripping and resealing after use. |
Three assembly referencesThe technical reference shows a basic assembly, a pop-up spring assembly and a wire-spring assembly. These are configuration alternatives; they should not be described as interchangeable without fit confirmation. Non-refillable requirementIf your application requires a non-refillable closure, specify this separately. Tamper evidence alone does not establish resistance to refilling. The exact mechanism and performance need confirmation. |
CUSTOM DECORATION
A closure that fits your packaging identity.
Discuss shell colors, top and side printing, hot stamping and embossing for your selected format. Decoration availability depends on the cap structure and artwork. Approve a physical sample to check color, logo positioning and the finished appearance beside your bottle label.
Share artwork
Provide your logo, color reference and intended placement.
Review the format
Confirm dimensions, insert function and neck compatibility.
Approve samples
Check appearance, opening, pouring and resealing before production.
PRODUCTION PLANNING
From Approved Specification to Finished Closures
The production route is selected for the approved closure assembly. It may include aluminum preparation and decoration, shell forming, plastic component molding, secondary decoration, component assembly, inspection and packing. The sequence and equipment used vary by format.
MANUFACTURING & EQUIPMENT
Manufacturing Capabilities Behind the Closure
Our partner manufacturing facilities provide the production and engineering capabilities shown below. These photographs are taken from the supplied manufacturing reference and illustrate general closure-making equipment. They are not presented as a dedicated olive oil cap line or as facilities owned by Colors Glass.
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01 / MANUFACTURING REFERENCE Aluminum Sheet PrintingSheet printing establishes the artwork before cap forming. The manufacturing reference shows a FUJI offset printing and coating line. Color references, print positions and the formed-cap appearance should be reviewed together during sample approval. |
Printed aluminum preparation and decoration
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Aluminum surface-finishing line
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02 / MANUFACTURING REFERENCE Aluminum Surface FinishingThe reference includes a roll-coating line for aluminum surface treatment. This is a metal-finishing process used in closure manufacturing. The coating system and relevant material documents should be confirmed for the selected product. |
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03 / MANUFACTURING REFERENCE Cap Forming & Automated ProductionCap production requires forming equipment and tooling appropriate to the selected shell geometry. The reference includes stamping equipment and automated production equipment from SACMI and other manufacturers. Final dimensions and tool requirements depend on the cap format. |
Automated closure production equipment
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Plastic component injection molding equipment
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04 / MANUFACTURING REFERENCE Plastic Component Injection MoldingInjection molding produces the plastic components used inside closure assemblies. The reference shows high-speed injection molding equipment. Insert geometry, material grade and bottle-neck engagement must be confirmed for each selected assembly. |
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05 / MANUFACTURING REFERENCE Roll Printing for Closure DecorationThe reference lists CALF and OMSO roll-printing equipment. Printing capability supports the review of decoration positions and artwork on closure components. The available printing method and color configuration are confirmed for the chosen format. |
Roll-printing equipment for closure decoration
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Hot-stamping equipment
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06 / MANUFACTURING REFERENCE Hot Stamping for Brand DetailsThe equipment reference identifies a MADAG hot-stamping machine. Hot stamping can be considered for metallic logos or details, subject to the cap geometry, artwork and required finish. Physical samples provide the basis for appearance approval. |
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07 / MANUFACTURING REFERENCE Component Assembly & Production HandlingAutomated manufacturing equipment supports component handling and production operations. The exact assembly route depends on the selected shell, insert and functional components. Confirm the approved configuration before production rather than assuming every insert can use the same assembly setup. |
Automated closure manufacturing equipment reference
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QUALITY CONTROL
Review Materials, Appearance and Functional Fit
| Control area | What the reference establishes | What to agree for your order |
|---|---|---|
| Incoming materials | The reference describes fixed material suppliers and grades, supplier quality agreements and retained incoming-material samples. | Material specification, traceability requirements and applicable food-contact documentation. |
| Appearance | High-speed automatic inspection and a visual inspection interface are shown. | Relevant defects, decoration approval, acceptance limits and inspection coverage. |
| Dimensions & assembly | Tooling and development equipment are shown; specific tolerances are not established here. | Approved drawings, component fit and dimensional acceptance criteria. |
| Bottle performance | No model-specific test results are supplied for the selected olive oil assembly. | Bottle fit, opening, leakage, pouring, resealing and any non-refillable requirement. |
DEVELOPMENT & SAMPLE APPROVAL
Evaluate the Closure on Your Actual Bottle
Start with the bottle-neck drawing or sample and your preferred cap format. Review insert requirements, decoration feasibility and any tooling changes. Evaluate physical samples for fit, first opening, pouring and resealing before approving the order.
Sampling time, custom tooling charges and production lead time are quoted separately according to the project. The equipment shown supports general engineering discussions and does not guarantee that every requested design is feasible.
PACKING & DELIVERY
Confirm the Packing Specification with Your Order
Confirm carton quantity, carton dimensions, gross weight, pallet arrangement and labeling requirements for the selected closure. Packing and handling should protect the approved finish and maintain the condition of internal components. Final packing data and shipping terms are provided with the quotation or order confirmation.
BOTTLE & LINE MATCHING
Confirm compatibility before production.
Send a bottle-neck drawing or physical bottle sample together with details of your capping equipment. We can review the required closure format and coordinate sample evaluation before the order is finalized.
- Bottle finish: thread profile, sealing land, neck bore and relevant tolerances.
- Closure: nominal size, insert type and tamper-evident or non-refillable requirements.
- Capping line: application method, tooling and operating conditions.
- Evaluation: fit, opening behavior, leakage, pouring and resealing.
- Documentation: food-contact information for the exact materials and destination market.
A matching nominal diameter does not guarantee fit. Final suitability depends on the bottle, closure assembly and capping process.
BUYING INFORMATION
Prepare a complete quotation request.
For olive oil producers, bottlers and private-label packaging projects, a complete specification helps avoid delays in sampling and quotation.
| Product | Olive oil bottle closure with pourer insert |
|---|---|
| Construction | Aluminum shell with plastic internal components; exact material grades to be confirmed |
| Decoration | Color and print options; hot stamping and embossing subject to format confirmation |
| Quantity | Provide order quantity per size, color and artwork |
| MOQ & lead time | Quoted according to the selected configuration and decoration |
| Packing | Carton quantity, carton size and pallet arrangement confirmed with the quotation |
| Samples | Request samples for bottle fit and pouring evaluation |
FREQUENTLY ASKED QUESTIONS
Before you choose a closure.
Will a 31.5 mm cap fit any olive oil bottle?
No. Nominal cap diameter is only a starting point. The bottle finish, sealing surfaces and insert geometry must match the selected closure.
Are all options non-refillable?
No universal non-refillable claim is made for this range. Specify the requirement and confirm the mechanism and testing for the selected assembly.
Can I customize the cap color and logo?
Color and decoration options can be reviewed for your cap format. Submit artwork and color references for feasibility review and sample approval.
What is your production lead time?
Production lead time is confirmed with the quotation according to quantity, configuration, decoration and sample approval. Sampling time is quoted separately.
What information is needed for a quote?
Send the bottle-neck drawing or sample, cap size, insert requirement, quantity, artwork, capping equipment details and delivery destination.
Can you provide food-contact documents?
Request the applicable documentation for the selected materials and destination market during specification review.
