Vodka, a spirit originating from Eastern Europe and now enjoyed globally, has seen its packaging evolve significantly over time. From traditional corks and glass stoppers to modern plastic and metal screw caps, bottle closures have become more than just a seal—they now represent brand identity and incorporate advanced anti-counterfeiting technologies.
The 31.5x18mm aluminum ROPP cap produced by HAOMEI Aluminum is a short-height aluminum screw cap specifically designed for bottled spirits such as vodka, brandy, and whiskey. Using ROPP (Roll-On Pilfer-Proof) technology, this cap is roll-threaded to form a secure seal that offers tamper-evidence, leak prevention, and enhanced shelf appeal—making it a popular choice in the alcoholic beverage packaging industry.
Specifications
| Type | ROPP cap |
| Material | Aluminum 8011 H14 |
| Application | Spirit bottles |
| Feature | Tamper-evident |
| Common International Sizes | 18*12mm, 25*43mm, 28*31.5mm 28*38mm, 28*44mm, 39*35mm 30*24mm, 30*44mm, 30*60mm 31.5*18mm, 31.5*24mm, 31.5*44mm 31.5*60mm, 31.5*60mm (and custom sizes) |
| Color | Standard black or white; other colors available upon request |
| Packaging | Carton + wooden pallet |
| Samples | Available |
| Customization | Accepted |
| MOQ | 80,000 pieces |
Why Is the 31.5 x 18mm ROPP Cap So Popular for Vodka Bottles?
Secure Seal: Excellent sealing capabilities, crucial for preserving the quality of spirits and preventing leaks.
Tamper Evidence: Tamper-evident design assures consumers of authenticity and product integrity.
Customization: Highly customizable in colors, logos, embossing—enhancing shelf presence and brand recognition.
Production Efficiency: ROPP capping machines operate at high speeds, ideal for large-scale bottling lines.
HAOMEI Value-Added Services
OEM neck mold customization
Multi-color offset printing or full-body decoration
Barcode/QR code/laser marking for traceability
Free samples for sealing and compatibility testing
Packaging Details
Caps are packed in PE bags and placed into five-layer corrugated cartons that meet export standards, labeled for identification.
Size: Custom and standard international sizes available
Color: Per buyer’s request
Carton: Standard export-grade pressure-resistant cartons
