Explore our flagship OEM/ODM double-walled stainless steel tumblers, sports flasks, and custom hydration containers engineered for global wholesale partners.
Navigating shift from low-cost commodities to high-precision thermal engineering in the global beverage container market.
The global reusable drinkware sector is undergoing a profound paradigm shift driven by heightened environmental awareness, modern lifestyle mobility, and strict regulatory limits on single-use plastics. According to real-time industrial telemetry, the global reusable water bottle market is projected to expand from USD 8.95 billion to over USD 14.2 billion by 2030, registering a compound annual growth rate (CAGR) of 6.2%. Within this expanding market, premium stainless steel double-walled vacuum vessels represent the fastest-growing segment, capturing over 42% of overall demand.
At the center of this global market expansion is China's advanced hardware manufacturing cluster, primarily anchored in Zhejiang Province. Cities such as Wuyi and Yongkang form the undisputed global manufacturing center for stainless steel vacuum insulation products, producing over 70% of the world's thermal flasks, tumblers, and hydration accessories. The region's competitive edge has shifted from simple labor arbitrage to an advanced ecosystem featuring automated tooling, robotic laser welding, proprietary getter coating applications, and resilient tier-1 raw material supply chains.
Strategic Sourcing Insight: Modern OEM/ODM procurement strategies require more than standard unit pricing comparisons. Global brand owners must evaluate suppliers on vacuum integrity longevity, metallurgical purity (trace element analysis in austenitic steel), compliance risk mitigation (FDA, LFGB, California Prop 65), and agile tooling turnaround times.
Leading the industry in precision stainless steel flask manufacturing, R&D innovation, and global OEM/ODM partnerships.
Located in Wuyi County, Zhejiang Province—the core hub of China’s stainless steel hardware industry—Wuyi Dongyi Dailysupplies Co., Ltd. stands as a premier manufacturer specializing in the research, development, and high-volume production of food-grade stainless steel tumblers, travel mugs, outdoor sports bottles, cola-shaped flasks, and vacuum insulated ice buckets. Our product portfolio spans both advanced double-walled vacuum insulation constructions and lightweight single-wall hydration containers tailored for global retail brands, corporate promotions, and industrial clients.
Our modern manufacturing facility houses automated metal pressing presses, multi-axis laser seam welding machines, high-vacuum furnace extraction arrays, and fully automated electrostatic powder coating lines. Complemented by a rigorous quality control framework and a veteran R&D engineering team, we ensure every vessel leaving our factory meets exact dimensional and thermal specifications.
End-to-end custom product development from initial 3D CAD modeling and rapid SLA prototyping to proprietary mold development and full production rollout.
Exclusive use of certified food-grade SUS304 (18/8) and medical-grade SUS316 stainless steel, offering superior corrosion resistance and zero flavor transfer.
Industrial vacuum ovens extract air down to 10⁻³ Pa, augmented by interior copper coating to minimize radiative heat loss and ensure 12h hot / 24h cold thermal performance.
Deep-dive metallurgy, vacuum extraction physics, and specialized surface finishing technologies.
The structural foundation of a high-performance vacuum flask relies entirely on its alloy chemistry. At Wuyi Dongyi, we enforce strict spectrographic material verification upon raw coil arrival. We utilize Austenitic Stainless Steel Grade SUS304 (containing 18% Chromium and 8% Nickel), which provides exceptional toughness and resistance to oxidation.
| Material Grade | Chemical Composition | Corrosion Resistance | Primary Application Scenarios |
|---|---|---|---|
| SUS304 (18/8) | 18% Cr, 8% Ni, Balance Fe | High (Resistant to organic acids & beverages) | Standard tumblers, coffee mugs, outdoor sports flasks. |
| SUS316 (18/10/2) | 18% Cr, 10% Ni, 2% Mo | Superior (High resistance to chlorides & saline liquids) | Medical-grade hydration, infant thermal bottles, isotonic sports drinks. |
| Single-Wall SUS304 | 18% Cr, 8% Ni | High Structural Rigidity | Ultra-lightweight backpacking bottles, single-layer ice cups. |
Heat transfer across liquid containers occurs via three distinct physical mechanisms: Conduction, Convection, and Radiation. Our double-walled engineering systematically targets and eliminates each vector:
The exterior finish must resist abrasion, chemical degradation, sweat, and UV-induced fading while offering tactile comfort. Our factory employs five advanced surface finishing technologies:
Provides a thick, textured, non-slip exterior layer that resists chipping and scratches during outdoor and tactical use.
Allows high-resolution complex visual artwork, gradient transitions, and localized tactile gloss patterns directly onto the vessel body.
Removes the exterior paint layer with sub-millimeter precision, revealing the raw bright stainless steel for permanent, wear-resistant brand logos.
How Wuyi Dongyi converts raw stainless steel coils into certified, world-class thermal drinkware.
Automated cutting and high-frequency induction seam welding turn premium SUS304 sheet steel coils into straight tubes with verified thickness uniformity.
High-pressure fluid expansion shapes raw steel tubes into complex contours—such as skinny tumblers, egg-shaped cups, or cola bottles—without compromising wall strength.
Inner and outer shells are assembled together with precision laser welds along the neck and bottom base, ensuring a airtight structural seal.
Vessels enter continuous high-temperature vacuum baking ovens where air is completely evacuated and getter materials seal the vacuum node.
Inner surfaces undergo an electrolytic bath to eliminate microscopic pores and smooth out the metal, while outer shells undergo powder coating or painting.
Every bottle undergoes double infrared thermal testing (hot & cold retention checks) before moving to laser logo application, lid fitting, and final master carton assembly.
Ensuring full regulatory compliance across North American, European, and Asia-Pacific consumer markets.
Navigating global market regulations requires strict adherence to international safety, chemical, and environmental standards. Wuyi Dongyi operates under an integrated ISO 9001:2015 Quality Management System. Our manufacturing processes strictly comply with global food-contact material standards, ensuring smooth customs clearance and zero compliance risk for wholesale buyers and brand owners.
All food-contact components (stainless steel walls, silicone gaskets, lid plastics) are certified free of heavy metals, phthalates, and harmful extractables.
Strict sensoric and chemical testing guarantees zero taste or odor transfer under acidic and alcoholic liquid simulation tests.
All plastic lids, straws, and flip covers are manufactured exclusively from virgin polypropylene (PP) or Eastman Tritan™ Copolyester.
Factory Audit Preparedness: Our facilities routinely pass third-party social accountability and factory audits, including BSCI (Business Social Compliance Initiative), SMETA (Sedex Members Ethical Trade Audit), and ISO 14001 Environmental Management benchmarks.
Tailoring product design, capacity, and features to regional consumer trends and usage environments.
| Target Region | Popular Form Factors | Key Market Drivers & Consumer Preferences |
|---|---|---|
| North America | 40oz & 30oz Tumblers with Ergonomic Handles, Skinny 20oz Tumblers | Car-cup holder compatibility, oversized capacities for daily hydration goals, spill-proof multi-way straw lids, pastel & powder-coated finishes. |
| Western Europe | 500ml / 750ml Sleek Sports Bottles, Compact Coffee Tumblers | Minimalist industrial aesthetics, strict environmental/plastic-free credentials (LFGB), high thermal performance for hot espresso/tea commuting. |
| Middle East & LatAm | 64oz Outdoor Vacuum Flasks, Heavy-Duty Ice Buckets | Extreme thermal insulation to resist ambient temperatures above 45°C, high-capacity containers for outdoor work and group activities. |
| Asia-Pacific | 8oz/12oz Egg-Shaped Swig Cups, Ultra-light Desk Coffee Mugs | Lightweight portability, tea infusers, office coffee mugs, stylish metallic finish options. |
Pioneering next-generation smart hydration, sustainable materials, and Industry 4.0 automation.
Integrating PCR 90% stainless steel into mainstream manufacturing lines to reduce carbon footprint by up to 60% per unit produced.
Embedding low-power OLED touch lids with real-time temperature displays, hydration reminders, and UV-C sterilization caps for clean water anywhere.
Deploying computer-vision cameras along assembly lines to instantly spot micro-dents, paint inconsistencies, and laser weld defects with sub-millimeter precision.
Direct answers to common commercial, technical, and logistics questions from global wholesale buyers.
Standard MOQ for stock custom colors and laser-etched logos starts at 1,000 units per model. For fully custom pantone color matching, specialized pattern printing, or bespoke lid molds, MOQ is typically 2,000 to 3,000 units depending on capacity.
Every vessel undergoes a two-stage thermal testing process. Following vacuum extraction, bottles pass through an automated infrared temperature scanning line. Cold or warm spot anomalies are flagged instantly, guaranteeing 100% vacuum seal retention prior to coating and packaging.
Yes. Our R&D engineering team provides comprehensive ODM support. We translate your initial concept drawings into precise 3D CAD models, deliver SLA rapid physical prototypes within 5-7 working days, and manufacture custom mass-production tooling within 25-30 days.
We provide full documentation packages including FDA 21 CFR test reports, EU LFGB compliance certificates, material composition batch analysis (SUS304/SUS316 mill test certificates), and factory audit reports (BSCI / ISO 9001).
Browse our popular wholesale line of outdoor insulated flasks, skinny tumblers, and heavy-duty hydration solutions.
Dongyi