Located in Wuyi County, Zhejiang Province—the global industrial epicenter for thermal container manufacturing—Wuyi Dongyi Dailysupplies Co., Ltd stands as a benchmark enterprise specializing in the research, development, structural engineering, and mass production of premium food-grade stainless steel drinkware. Our infrastructure encompasses high-precision double-walled vacuum insulation vessels, ergonomic single-walled outdoor flasks, high-capacity travel quenchers, and specialized thermal containers.
By adhering strictly to international quality management systems, our facility operates automated robotic double-seal vacuum furnaces, multi-axis hydraulic metal shaping presses, and automatic electrostatic powder coating lines. We maintain an in-house metallurgical testing lab that evaluates corrosion resistance, thermal retention decay curves, vacuum integrity under negative pressure ($10^{-4}\text{ Torr}$), and toxicological compliance.
| Component | Material Grade | Chemical Composition | Regulatory Certifications | Performance Threshold |
|---|---|---|---|---|
| Inner Vessel Wall | Austenitic SS 304 / SS 316 | 18% Cr / 8% Ni (304) or 16% Cr / 10% Ni / 2% Mo (316) | EC 1935/2004, LFGB, FDA 21 CFR | Zero metallic transfer, high acid/alkali corrosion resistance |
| Outer Shell Body | Stainless Steel 304 / 201 Premium | Structural Grade Stainless Alloy | REACH, RoHS, EN 12546-1 | High impact strength, superior coating adhesion |
| Lid Assembly & Straws | Food-Grade PP / Tritan / AS | BPA-Free Polypropylene / Co-polyester | EU 10/2011 Plastic Standard, FDA | Thermal stability up to 120°C, high clarity & crack resistance |
| Sealing Gasket | Medical-Grade Liquid Silicone | Polydimethylsiloxane Polymer | LFGB, French DGCCRF, FDA | 100% leak-proof elasticity, zero taste degradation |
| Vacuum Layer Shield | Pure Copper Foil Barrier | 99.9% Refined Cu Plating | CE Thermal Protocol Internal Spec | Blocks radiative heat exchange; enhances hot/cold retention by 30% |
Submit 2D/3D CAD drawings or request stock sample modifications. Our engineering team assists with wall thickness, lid compatibility, and ergonomic optimization.
Receive itemized unit costing, tooling fee breakdowns, material safety data sheets (MSDS), and expected production timelines tailored to your target delivery port.
3D printed lid samples and CNC stainless steel prototypes are produced within 7–10 days. Pre-production samples undergo CE compliance pre-screening.
Upon artwork and golden sample approval, automated production lines commence stamping, vacuuming, coating, and logo laser-marking under ISO 9001 supervision.
In-line AQL 2.5/4.0 inspection covers coating hardness, drop resistance, vacuum thermal hold, lid leak-tightness, and barcode readability.
FOB, CIF, or DDP delivery options complete with full EU Declaration of Conformity (DoC), Bill of Lading documentation, and customs assistance.
Dongyi
