In packaging sectors that demand high safety—such as pharmaceuticals, health supplements, and functional beverages—the bottle cap is more than just a seal; it's the first line of defense for consumer trust. The 33x47mm and 33x58mm aluminum-plastic caps are increasingly favored by brands due to their excellent tamper-evident features, premium metallic aesthetics, and superior sealing performance.
These tamper-evident aluminum-plastic caps are primarily designed for spirits packaging—such as whiskey, baijiu, and rum—but can also be adapted for sealing beverage bottles.
Core Tamper-Evident Design
Tamper-Evident Ring: Designed with score lines or pre-indented grooves that break upon first opening, ensuring one-time destruction for effective anti-counterfeiting in food and pharmaceutical packaging.
Integrated Locking Structure: The aluminum-plastic cap and bottle neck snap together. Any unauthorized opening causes deformation of the plastic liner or tearing of the aluminum shell.
Product Specifications
| Sizes | 33x47 mm, 33x58 mm |
| Material Structure | Outer shell: Aluminum alloy (8011-H14/H16) |
| Inner liner: Food-grade PP or PE | |
| Surface Finishes | Brushed, polished, hot stamping foil, silk screen printing, laser engraving, etc. |
| Opening Mechanism | Screw cap + breakaway ring |
| Compatible Bottles | PP/PE/PET/glass bottles with threaded necks (commonly 18/415, 28/410, etc.) |
| Applications | Wine, spirits, olive oil, beverages, etc. |
| Samples | Available |
| OEM/ODM | Accepted |
| Certifications | ISO9001, ISO45001, etc. |
| MOQ | 50,000 pieces |
Key Features of the Tamper-Evident Aluminum-Plastic Cap
Excellent Sealing: Combines the rigidity of aluminum with the elasticity of the plastic liner to prevent contamination and leakage.
High Mechanical Strength: Aluminum shell protects contents from external damage.
Strong Corrosion Resistance: Suitable for various environments, extending shelf life.
Easy to Open: Features an easy-tear strip for user convenience.
Stable Performance: Maintains a long-term, reliable seal.
Attractive Appearance: Customizable colors enhance product image and perceived value.
Cost-Effective: Simple yet high-performing structure meets demanding packaging requirements.
Wide Application: Ideal for pharmaceuticals, alcoholic beverages, food, cosmetics, and more.
33×47 mm vs. 33×58 mm: How to Choose?
33×47mm: Recommended for 20–50ml pharmaceutical and supplement glass bottles. More compact and refined in appearance.
33×58mm: Suitable for 50–100ml larger liquid products, offering a more premium and professional impression.
Why Choose HAOMEI Aluminum?
As a specialized bottle cap manufacturer, HAOMEI Aluminum produces a wide range of aluminum caps, aluminum-plastic caps, and aluminum closure sheet materials. With rich product lines and customization options, our products are exported globally, and samples are available to ensure your satisfaction.
If you require sample testing, custom drawings, or a technical specification sheet (including material data, torque, sealing performance, etc.), feel free to contact us for professional support.
