About Duolong Group
A vertically integrated glass packaging manufacturer trusted by global buyers
Shandong Duolong Packing Co., Ltd. is a comprehensive industrial group specializing in premium glass packaging solutions. Headquartered in Heze, Shandong — the heart of China”s glass manufacturing hub — we operate a fully integrated supply chain with dedicated subsidiary factories for bottle caps and molds. We serve clients worldwide, from boutique fragrance brands to large-scale spirit distributors.
Manufacturing Scale
World-class facilities designed for speed, capacity, and precision
42 Automatic Lines
Full automatic production lines with 36 manual craft lines for specialized orders
2,756 m2 Facility
Production floor with 27 skilled staff, QA/QC inspectors on every shift
800,000 / Day
Daily output across all glass container types, from 30ml perfume to 1000ml spirit bottles
Integrated Supply Chain
Two subsidiary factories ensure a tightly integrated packaging ecosystem
Bottle Cap Factory
Equipped with fully automatic capping and injection molding machines. Produces iron caps, plastic caps, aluminum caps, and corks — including patented trademark closures compatible with our glass bottles.
Mold Factory
Custom mold development based on client drawings and sample bottles. High-quality, high-precision molds delivered in the shortest turnaround — enabling rapid new product launches.
SGS Verified
Onsite verified by SGS Group in January 2026. Panoramic factory display available for remote inspection.
Trade Shows
2 international trade shows attended. Active in global packaging and spirits industry exhibitions.
Quality Control
2 testing instruments, dedicated QA/QC inspectors, raw material traceability — every batch meets international standards.
Deep Customization Services
All finishing processes performed in-house for seamless quality control
- Frosting (Sandblasting)
- Precision Engraving
- Decal Application
- Silk Screen Printing
- Hot Stamping (Gold / Silver)
- Color Spraying & Gradient
- Glazed Firing
- Embossing / Debossing
“Quality First, Customer Foremost” — Our commitment to excellence drives every bottle we produce. Competitive pricing, reliable quality, and professional service make us the preferred choice for global glass packaging buyers.
— Duolong Group, Heze Shandong China