The ROPP (Roll-on Pilfer Proof) cap is tightly fitted to the bottle neck threads through a rolling process. The inner sealing liner (such as PE or food-grade rubber) ensures an airtight seal. The bottom of the cap features a tamper-evident ring that breaks upon the first opening, leaving a visible mark to prevent unauthorized opening. ROPP caps are widely used in industries such as beverages, pharmaceuticals, and high-end liquid packaging.
The 38mm aluminum ROPP cap is made from high-purity aluminum, with a polished or coated surface to give it a silver sheen, offering both lightweight properties and corrosion resistance.
Core Advantages of the 38mm Aluminum ROPP Cap
High Sealability: The combination of aluminum material and the sealing liner effectively prevents oxygen and moisture from entering, extending the shelf life of the contents. This makes it ideal for liquids prone to oxidation (such as alcoholic beverages and essential oils).
Tamper-Evident Design: The tamper-evident ring ensures physical damage occurs when the cap is opened, signaling the bottle has been tampered with. This feature is essential for pharmaceutical and premium liquor packaging.
Aesthetic Compatibility: The silver appearance is compatible with both transparent glass and PET bottles. Custom surface textures and colors (such as silver with red or blue bottoms) can be created to enhance brand visibility.
Lightweight & Durable: Aluminum is lightweight yet resistant to corrosion, making the cap suitable for long-term storage and transport.
Recyclability: Aluminum is 100% recyclable, making the cap environmentally friendly, supporting sustainability, and reducing resource waste.
Tamper-Proof Aluminum ROPP Cap Specifications
| Size | 38mm |
| Material | Aluminum 3105 |
| Colors | Silver, gold, green, blue (customizable) |
| Printing Process | Silk screen printing, side printing, hot stamping (top, side, and positional), embossing, etc. |
| Applications | Carbonated water, beer, coffee, etc. |
| Certifications | Food safety certification (ISO9001, ISO14001, ISO45001, etc.) |
| MOQ | 50,000 pieces |
Applications of Aluminum Screw Caps
Alcohol Packaging
Used for premium liquors such as Cognac, whiskey, and other high-end beverages, often paired with a lock design to protect the precious contents.
The silver aluminum cap combined with a glass bottle exudes a luxurious feel.Pharmaceutical and Cosmetics
Pharmaceutical bottle caps (such as 32mm aluminum-plastic composite caps) comply with hygiene standards, preventing moisture and contamination.
Cosmetic bottle caps (such as essential oil bottle caps) emphasize sealing to avoid leakage or oxidation.Food and Beverage
Food-grade PET cans paired with aluminum caps (such as honey jars) meet moisture-proof requirements and support wide-mouth designs for easy access.
Beverage cans with easy-open aluminum caps are designed for high-speed filling lines and reduce the risk of transport damage.
HAOMEI Aluminum is a professional bottle cap manufacturer that has specialized in the bottle cap industry for years. We provide a wide range of cap products for industries such as liquor, beverages, and seasonings. Our products include aluminum caps, aluminum-plastic composite caps, plastic caps, ROPP caps, wine aluminum caps, beverage caps, and printed aluminum plates. With a wide variety of products and high-quality standards, we offer customization according to customer needs, direct sales from the manufacturer, fast delivery, competitive prices, and sample availability.
