At a glance
Quick sourcing summary
- Documented processes
- Metal forming, vacuum-flask production, polishing, coating, standards and quality work
- Category boundary
- Plastic, glass and baby feeding bottles are excluded
Evidence-backed sourcing regions
Each location below is classified by the role supported by the cited evidence. The classification does not verify an individual supplier.
Zhejiang, China
Yongkang cup and flask manufacturing area, Yongkang
Sourcing notes
Use Yongkang as the primary cluster, then verify each supplier's forming, welding, vacuum, coating and assembly processes.
Why this location is included
Independent current policy and quality sources explicitly support Yongkang's cup and vacuum-flask manufacturing role. [1][2][3]
What buyers should verify
- Steel grade and traceability
- Vacuum, leak and thermal tests
- Lid and component food-contact scope
- Coating, printing and packaging
Buyer risks
- Hardware company may not make bottles
- Reports may not match every component
- Subcontracted coating or welding may affect consistency
Zhejiang, China
Wuyi County, Wuyi
Sourcing notes
Treat Wuyi as a partially verified production base, not as equal proof of a county-wide cluster. Verify the exact factory and in-house processes.
Why this location is included
Independent official records confirm exact vacuum-flask manufacturing in Wuyi, but region-wide scale and geographic specialization remain incomplete. [4][5]
What buyers should verify
- Legal production address
- Forming, welding, vacuum, polishing and coating
- Material and component traceability
- Product-specific test reports
Buyer risks
- Evidence does not define the full county cluster boundary
- A large producer does not prove all local sellers manufacture
- Project approvals are not quality endorsements
Why this region matters
Independent current policy and quality records support Yongkang's exact cup-and-flask manufacturing and standards ecosystem. [1][3]
Independent 2024-2025 official records confirm vacuum-flask production in Wuyi, but not a complete county-wide cluster boundary. [4][5]
What buyers can source here
- Stainless-steel water bottles
- Vacuum flasks and insulated tumblers
- Travel mugs and sports bottles
- Food jars and thermos-style products
- Lids, coatings, printing and gift packaging
Manufacturing cluster vs wholesale market
Manufacturing cluster
Yongkang is the verified cluster; Wuyi is a partially verified production base with exact operating evidence.
Wholesale or trading market
Yiwu mixed-goods trade is not retained as manufacturing origin or a distinct product-specific role.
Regional sourcing model
Metal drinkware manufacturing with supplier-specific forming, welding, vacuum, coating, component and assembly checks.
Best for / less suitable for
Best for
- Private-label stainless-steel drinkware
- Vacuum flasks, tumblers and travel mugs
- Shape, lid, coating, printing and packaging programs
- Buyers able to commission food-contact and performance tests
Less suitable for
- Plastic, glass or baby feeding bottles
- Buyers accepting a 304 stamp as material proof
- Orders without leak and insulation tests
- Products whose lids and plastics are not covered by testing
How to verify that a supplier is connected to this cluster
- Verify stainless-steel grade and material traceability for inner wall, outer wall and other metal parts.
- Document forming, internal welding, soldering or brazing and vacuum-insulation processes.
- Run thermal-retention, leak, lid-seal, thread-fit, pressure or drop tests as relevant.
- Test heavy metals and food-contact requirements for metal, plastic and silicone components in the destination market.
- Treat a 304 stamp and BPA-free wording as claims, not proof covering every component.
- Approve coating, printing, odor, dishwasher and logo-durability requirements for the exact model and color.
- Confirm cup-holder fit, packaging, carton strength and carton drop-test method.
- Approve samples and retain a control sample for batch consistency.
Buyer risks and caveats
- A grade stamp does not prove stainless-steel composition.
- One food-contact report may not cover every lid, color, coating or silicone component.
- Vacuum, leakage and coating performance can vary by batch.
- The regional hardware ecosystem does not prove a supplier performs bottle production in-house.
This guide provides sourcing research, not legal, compliance or supplier-safety guarantees.
Latest documented developments
These updates describe documented regional activity. Planned or under-construction projects are not treated as completed capacity.
Yongkang
The provincial quality platform documents current standards activity and a strong operating cup-and-flask industry. Recognition does not verify every supplier or model. [3]
Wuyi County
The tax authority documents operating forming, polishing, coating and logistics at a Wuyi producer. The record supports manufacturing presence, not a complete county-wide cluster conclusion. [4]
Visit and map guidance
Use Yongkang as the primary cluster and Wuyi as a secondary lead. Confirm production, component, coating and warehouse addresses before visiting.
Yongkang, Jinhua, Zhejiang
Yongkang, Zhejiang
Yongkang cup and vacuum-flask manufacturing area
Use Yongkang as the primary cluster, then verify each supplier's forming, welding, vacuum, coating and assembly processes.
28.895, 120.047
Review location evidenceWuyi County, Jinhua, Zhejiang
Wuyi, Zhejiang
Wuyi County vacuum-flask production area
Treat Wuyi as a partially verified production base, not as equal proof of a county-wide cluster. Verify the exact factory and in-house processes.
28.8926, 119.8165
Review location evidenceMap links are provided for location reference. Industrial cluster boundaries may not match official administrative boundaries. Always verify supplier addresses before visiting.
Related sourcing regions
Editorial evidence
Sources & Evidence
Each source is mapped only to the claims it supports. External links do not imply affiliation or endorsement.
Yongkang policy measures for high-quality economic development
Yongkang Municipal People's Government
- Published
- 2024-04-01
- Accessed
- 2026-07-26
- Source type
- municipal government policy
What this source supports
- Cup and flask manufacturing is a Yongkang priority chain
- Digital upgrading is supported
- Supplier performance remains unverified
Hardware evidence is used only where cups and flasks are explicit.
Open source linkYongkang 2023 Government Work Report
Yongkang Municipal People's Government
- Published
- 2023-03-06
- Accessed
- 2026-07-26
- Source type
- municipal government report
What this source supports
- Vacuum flasks are a named Yongkang chain
- Logistics and export services support the category
- Current supplier capability needs verification
Historical scale is excluded.
Open source linkYongkang companies enter the national metal vacuum-flask standards list
Zhejiang Market Regulation Quality Infrastructure Platform
- Published
- 2025-02-13
- Accessed
- 2026-07-26
- Source type
- provincial market regulation platform
What this source supports
- Yongkang has an active cup and flask industry
- Standards work is current
- Tests must match the ordered model and configuration
Source-reported output is date-labeled if used.
Open source linkWuyi supports digital upgrading in traditional industries
Zhejiang Provincial Tax Service
- Published
- 2025-12-17
- Accessed
- 2026-07-26
- Source type
- Central government tax authority
What this source supports
- Stainless-steel vacuum-flask production operates in Wuyi
- Forming, polishing and coating processes are documented
- County-wide specialization remains incomplete
Supports Partially Verified status for Wuyi.
Open source linkApproval for a Wuyi vacuum-flask production-line upgrade
Jinhua Ecology and Environment Bureau
- Published
- 2024
- Accessed
- 2026-07-26
- Source type
- municipal environment authority
What this source supports
- Vacuum-flask manufacturing projects exist in Wuyi
- The source is product-specific
- Regional scale remains only partially verified
Used with the independent tax-authority record.
Open source linkReview notes
- What was verified
- Yongkang's cup-and-flask cluster has independent current authoritative support.
- What remains uncertain
- Wuyi has exact manufacturing evidence but incomplete region-wide scope, so the page remains Partially Verified.
- What buyers should confirm
- Confirm steel and component traceability, forming and welding, vacuum performance, food-contact scope, leak and thermal tests, coating and packaging.
- Last reviewed
- 2026-07-26
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Industrial belt data is updated based on public information, buyer feedback and manual review. Suggestions are reviewed before publication.