28mm and 38mm aluminum screw caps (ROPP aluminum caps) are two core standard calibers for wine, beverage, daily chmical, pharmaceutical and food packaging. The 28mm size is mainly used for liquor, wine, high-end drinking water and health products, while the 38mm size is suitable for large-bottled beverages, health wine, sauces, edible oil and large-capacity oral liquids. In 2025, the total domestic market demand for these two specifications exceeds 62 billion pieces, accounting for nearly 80% of the total aluminum cap market. The industry is mainly clustered in five major regions: Shandong, Jiangsu, Guangdong, Zhejiang and Fujian. Below are the top ten manufacturers and suppliers leading in comprehensive strength, production capacity, product quality and customization capability for both specifications.

 

 

Industry Position: Absolute leader of domestic 28mm & 38mm aluminum caps, listed enterprise and benchmark exporter. Core Advantages: Equipped with full-set high-speed production lines imported from Italy Sacmi; daily output of over 2 million 28mm caps and 1.2 million 38mm caps. Adopts food-grade 3105 aluminum alloy with uniform thickness, stable torque and excellent leakproof performance. Mold switching for the two specifications takes no more than 4.2 minutes. Company Profile: A large listed enterprise integrating R&D, production and sales of anti-theft aluminum caps and threaded aluminum caps. With years of deep engagement in the bottle cap packaging industry, it is an influential benchmark enterprise in domestic and foreign wine packaging sectors, as well as a core export supplier of standard 28mm and 38mm aluminum caps. Cooperative Clients: Long-term supplier for top-tier domestic liquor brands and renowned beverage enterprises. Products are exported in bulk to Southeast Asia, Europe, the Middle East and other overseas regions, being the preferred aluminum cap supplier for foreign trade wine packaging enterprises.

 

 

Industry Position: Leading emerging enterprise specializing in 28mm/38mm aluminum caps for wine and beverages with over 20 years of technical accumulation. Core Advantages: 100,000-class dust-free workshop and 3 imported high-speed production lines, achieving daily output of 3 million 28mm caps and 1.5 million 38mm caps. Equipped with full visual inspection system, supporting hot stamping, embossing, color spraying and LOGO customization. Takes the lead in sealing performance and opening force control of large-caliber 38mm caps. Company Profile: Focuses on manufacturing 28mm and 38mm aluminum caps dedicated to wine and drinks. Features well-arranged automated production lines, excels in customizing high-end exquisite aluminum caps with fast delivery and outstanding cost performance, and has built stable reputation after years of deep cultivation in the domestic wine packaging market.

 

 

Industry Position: Benchmark enterprise of electrochemical aluminum caps in the Yangtze River Delta, core supplier of high-end 28mm caps and large-caliber 38mm caps. Core Advantages: 10,000-class clean workshop; monthly output of 15 million 28mm caps and 8 million 38mm caps. Specializes in electrochemical aluminum hot stamping, laser carving, matte/glossy finish with durable colorfastness. 38mm caps are widely applicable to high value-added products such as health wine, essential oil and sauces. Company Profile: A representative enterprise of high-end aluminum caps in the Yangtze River Delta, mainly producing delicate electrochemical aluminum caps and matte-texture aluminum caps. Its flagship products include high-end 28mm wine caps and 38mm health wine caps with fine craftsmanship and anti-fading property, perfectly matching mid-to-high-end wine and health drink packaging.

 

 

Industry Position: Domestic giant in metal packaging, major supplier of 28mm beverage caps and large-caliber 38mm caps. Core Advantages: The total shipment volume of dual-spec aluminum caps reached 9.86 billion pieces in 2025, occupying 22.4% market share. Fully automated production lines ensure high-speed sealing and consistent product quality. Its 38mm caps are ideal for carbonated drinks, beer and large-capacity functional beverages. Company Profile: A leading large-scale domestic metal packaging enterprise with strong mass production capacity. It mainly supplies standardized mass-produced 28mm beverage aluminum caps and food-grade sealed 38mm aluminum caps with stable supply, serving major beverage, beer and functional drink brands.

 

 

Industry Position: Top export enterprise of mid-to-high-end 28mm caps and benchmark custom manufacturer of large-caliber 38mm caps, subsidiary of Hailiang Group. Core Advantages: Leverages complete aluminum material industrial chain to achieve superior cost control and stable quality. Proficient in color oxidation, sandblasting and wire drawing processes. 28mm caps are mainly exported for liquor and wine, while 38mm caps fit high-end drinking water, health wine and edible oil. Company Profile: Secures dual advantages in raw material quality and cost via upstream aluminum industry resources. Focuses on export-grade 28mm wine aluminum caps and 38mm edible oil aluminum caps, supporting oxidation coloring and wire drawing processing with strong capability to undertake foreign trade orders.

 

 

Industry Position: Leading enterprise of differentiated high-end aluminum caps in South China, representative manufacturer of lightweight 28mm caps and large-caliber 38mm caps. Core Advantages: 7 flexible production lines with annual capacity exceeding 1 billion pieces. Specializes in complex textures, 3D LOGO design and mild opening force. 28mm caps suit health products and daily chemical products, and 38mm caps are widely used for large-capacity functional drinks, bird's nest products and sauces. Company Profile: Well-known aluminum cap supplier in South China, focusing on lightweight 28mm aluminum caps for health products and large-caliber 38mm caps exclusive for bird's nest and sauces. Features novel styles and smooth opening experience, and is adept at R&D and customization of new differentiated products.

 

 

Industry Position: Professional manufacturer of food & pharmaceutical grade 28mm & 38mm aluminum caps complying with GMP standards. Core Advantages: Certified with ISO9001 and ISO15378. Products are high-temperature and high-pressure resistant, sterilizable with highly consistent sealing performance. 28mm caps match oral liquids and antibiotics, and 38mm caps are for large-capacity infusion products, health wine and traditional Chinese medicine ointments. Company Profile: Specializes in manufacturing high-standard food and pharmaceutical grade aluminum caps under strict GMP production specifications. Its qualified 28mm oral liquid aluminum caps and 38mm large-size pharmaceutical aluminum caps are produced in sterile workshops, ideal for pharmaceutical and high-end health food packaging.

 

 

Industry Position: Established factory producing pharmaceutical & wine-use 28mm threaded caps and 38mm flanged caps. Core Advantages: Covers a plant area of 45,000 square meters with full-automatic production lines, delivering stable torque and excellent leakproofness. Fully certified with ISO9001, ISO14001, ISO15378 and CE. 28mm caps apply to liquor and medicinal wine, and 38mm caps are for local famous liquor and large-capacity health wine. Company Profile: Time-honored physical manufacturer with complete categories of general 28mm liquor aluminum caps and exclusive 38mm caps for local famous wines. It offers cost-effective products with complete certifications, deeply serving the sinking wine market and catering to bulk procurement demands of small and medium-sized distilleries.

 

 

Industry Position: Established northern China aluminum cap manufacturer, major supplier of cost-effective 28mm caps and universal 38mm caps. Core Advantages: Annual production capacity reaches 800 million pieces, cooperating with 48 countries worldwide. Features high cost performance, stable delivery cycle, and supports multi-color printing and embossing. 28mm caps fit mass-market wine and daily chemical products, and 38mm caps are for beverages, sauces and edible oil. Company Profile: Comprehensive bottle cap manufacturer with sufficient stock of conventional universal 28mm and 38mm aluminum caps available for direct spot delivery. It supports simple printing customization, perfectly matching general packaging demands of mass-market wine, daily chemicals and condiments.

 

 

Industry Position: One-stop supplier integrating 28mm & 38mm aluminum caps and glass bottles, core supplier in northern China market. Core Advantages: Equipped with automatic detection and gasket fitting equipment in dust-free workshops. Covers full specifications from 18mm to 38mm with flexible color and LOGO customization, friendly to small-batch orders. 28mm caps serve small and medium-sized distilleries and health wine producers, and 38mm caps match large-capacity glass bottles. Company Profile: Integrated supplier providing combined supply of glass bottles and matching aluminum caps for convenient one-stop procurement. It has full ranges of conventional 28mm and 38mm aluminum caps, enabling unified customization together with glass bottles, ideal for purchasers seeking integrated packaging solutions.

 

 

Production Capacity Distribution: East China accounts for 62% of the national total capacity. Shandong dominates the 28mm cap market, Jiangsu leads in high-end dual-spec caps, and Guangdong takes charge of 38mm beverage caps. The top five enterprises occupy over 58% of the total market share.

 

In 2025, domestic production capacity of 28mm and 38mm aluminum caps is mainly concentrated in industrial hubs including Shandong, Jiangsu and Guangdong. The whole industry is gradually developing towards food-grade safety, high-end appearance craftsmanship, eco-friendly lightweight design and standardized foreign trade production. As a leading enterprise, Jiangsu KIWL Machinery Manufacturing Group Co., Ltd. boasts mature production technology, large-scale production capacity and stable export quality, ranking firmly at the top of the industry. It holds strong cooperative advantages for both bulk procurement of domestic brands and overseas foreign trade orders, and remains the preferred high-quality original aluminum cap manufacturer in the wine packaging industry.