Direct factory-engineered thermal solutions utilizing premium SUS304/SUS316 stainless steel for global retail brands and commercial enterprises.
Situated in the heart of China’s hardware manufacturing cluster in Wuyi County, Zhejiang Province, Wuyi Dongyi Dailysupplies Co., Ltd stands as a premier enterprise specializing in the research, development, metallurgical forming, and high-vacuum thermal seal production of food-grade stainless steel drinkware.
Our comprehensive catalog spans high-capacity outdoor vacuum flasks, ergonomic hydration tumblers, specialized coffee mugs, and mini gourds. By deploying dual-wall vacuum insulation construction alongside ultra-durable single-wall variants, we provide global OEM and ODM buyers with products engineered for extreme thermal retention, tactile comfort, and prolonged lifespan.
Equipped with high-precision hydraulic stretch presses, automatic copper plating lines, continuous vacuum degasification furnaces, and multi-axis laser welding robotic arms.
Information Gain Insight: Moving beyond basic aesthetic designs to examine molecular thermal transfer suppression, getter activation metallurgy, and sustainable coating engineering.
Conduction and convection thermal exchange require a physical gas medium. Our manufacturing process utilizes high-vacuum degasification chambers operating at temperature profiles exceeding 500°C. This evacuates interstitial gas molecules between the inner and outer walls down to an absolute pressure of 10-4 Pa, virtually eliminating thermal transfer via molecular collision.
While vacuum eliminates conduction and convection, thermal radiation (infrared heat transfer) persists. Dongyi implements high-purity electro-plated copper lining across the exterior surface of the inner stainless steel wall. This micron-thin copper layer reflects up to 95% of infrared thermal waves back into the vessel contents, maintaining heat or ice cold stability.
To eliminate metallic leaching and optimize mechanical strength, all internal liners are crafted from premium food-grade SUS304 (18/8) or surgical-grade SUS316L stainless steel. Passes electro-polishing to remove microscopic surface impurities, forming an inert chromium oxide passivation layer resistant to acidic beverages, coffee, and isotonic sports solutions.
Comparative structural assessment across vessel architectures under standardized laboratory ambient conditions (23°C ± 2°C):
| Vessel Specification | Insulation Architecture | Hot Retention (95°C Start) | Ice Cold Retention (0°C Start) | Corrosion Resistance |
|---|---|---|---|---|
| Standard Double-Wall Flask | Double-Wall Vacuum + Getter | > 68°C at 12 Hours | < 8°C at 18 Hours | High (SUS304 Passivated) |
| Premium Copper-Plated Flask | Vacuum + IR Copper Coating | > 74°C at 12 Hours / > 58°C at 24h | < 5°C at 24 Hours | Superior (SUS304 / SUS316) |
| Single-Wall Fitness Bottle | Single Layer Cold-Rolled | N/A (Rapid Dissipation) | Ambient Equilibrium in 2h | Standard (SUS304) |
| Ultra-Wide Mouth Tumbler | Vacuum + Foam Lid Insert | > 60°C at 6 Hours | < 9°C at 12 Hours | High (SUS304 Passivated) |
The global drinkware supply chain demands more than standard metal pressing; it demands high precision, operational flexibility, and environmental accountability. At Wuyi Dongyi Dailysupplies Co., Ltd, our smart factory infrastructure addresses the core challenges faced by global importers—lead time volatility, structural failure rates, and finish degradation.
Streamlined execution phases designed to guarantee rapid turnaround and defect-free output:
Whether supplying high-volume Amazon FBA brands, outdoor gear distributors, or corporate luxury gifting lines, our customized programs provide target fitment.
Custom packaging, FBA barcode bundling, drop-test certified inner boxes, and trendy colorways (pastel, gradient, matte) engineered for rapid consumer market entry and low return rates.
High-capacity flasks (48oz, 64oz) featuring rugged powder coats, heavy-duty paracord handles, leak-proof straw lids, and high-impact rubber boots designed for extreme environmental durability.
Laser engraving, silk-screen printing, 3D UV digital printing, and custom premium presentation boxes crafted to elevate corporate brand identity and promotional campaign impact.
Ergonomic tumblers with straw options, Swig-style egg cups, skinny tumblers, and traditional Yerba Mate gourds developed for targeted cultural and lifestyle beverage niches.
Our long-standing principle—"Quality First, Service First"—has enabled Wuyi Dongyi to build robust partnerships across the United States, Europe, South America, the Middle East, and Southeast Asia.
Navigating global import regulations requires strict product safety compliance. All Dongyi products are manufactured to exceed rigorous international health standards:
In-depth technical answers addressing critical manufacturing, customization, compliance, and logistical inquiries.
We primarily utilize food-grade SUS304 (18/8 stainless steel) for both inner and outer vessel walls, which provides superior corrosion resistance and structural integrity. For specialized applications (such as acidic beverages, hot coffee, or extreme environments), we offer surgical-grade SUS316L for the interior wall. Insulation performance is governed by the vacuum level (10-4 Pa degasification) and internal copper plating, rather than raw steel grade alone.
We provide full turn-key customization including custom Pantone color matching (matte finish, glossy finish, rubberized paint, powder coating, gradient transition), logo application (laser engraving, silk-screen printing, heat-transfer printing, 3D UV printing), and custom lid tooling (flip lids, straw lids, magnetic lids, wide-mouth handles).
Every single bottle undergoes a 3-step thermal inspection pipeline. First, post-vacuum sealing, vessels enter a high-temperature testing tunnel where infrared thermal sensors automatically detect heat dissipation on outer walls. Second, products undergo a 24-hour thermal decay test. Third, visual leak testing ensures a 99.8% first-pass qualification rate prior to final surface coating.
Standard OEM customized production MOQs start at 1,000 to 3,000 units per colorway/design depending on vessel capacity and surface complexity. Prototype samples are completed in 7-10 business days. Mass production lead times typically range between 25 and 35 days post sample approval and deposit confirmation.
Yes. All materials—including stainless steel bodies, BPA-free polypropylene (PP) caps, food-grade silicone seals, and optional Tritan straws—comply with US FDA 21 CFR standards, EU LFGB regulations, EC 1935/2004, and California Proposition 65 requirements. Full test reports from accredited third-party labs (SGS, TUV, Intertek) are available upon request.
Select from our standard fast-ship inventory or request tailored custom molding.
Partner with Wuyi Dongyi Dailysupplies Co., Ltd for uncompromised manufacturing standards, rapid prototyping, and scalable OEM/ODM fulfillment. Contact our engineering team today to receive detailed technical datasheets, CAD models, and factory-direct price schedules.
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