Stainless Steel Drinkware Factory & Quality Control

RakaCups supports international OEM and private-label stainless steel drinkware projects through a coordinated sales, manufacturing and quality-control process.

Raka Corporation Limited, Hong Kong, manages international sales, OEM/ODM communication and export coordination. Manufacturing in China is carried out by Yongkang Moka Metal Products Factory in Yongkang, Zhejiang.

Our team supports stainless steel mugs, tumblers, bottles and other reusable drinkware with custom logos, colors, finishes and packaging for brands, wholesalers, distributors and promotional product companies.

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Stainless steel drinkware cleaning and pre-packing inspection area

Manufacturing Capabilities & Production Process

Since expanding the manufacturing facility in 2019, Yongkang Moka Metal Products Factory has added automated material-forming equipment, laser welding and cleaning lines. These capabilities help improve consistency, support different product constructions and prepare customized drinkware for international orders.

See our 10-step stainless steel mug manufacturing process.

01 — Material Preparation

Stainless steel sheets and components are prepared according to the product specification, capacity and construction.

02 — Forming

Material-forming equipment shapes the inner and outer cup bodies. Dimensions and appearance are checked during production.

03 — Welding & Assembly

Cup bodies, handles and related components are welded and assembled according to the model design.

01 — Material Preparation

Stainless steel sheets and components are prepared according to the product specification, capacity and construction.

02 — Forming

Material-forming equipment shapes the inner and outer cup bodies. Dimensions and appearance are checked during production.

03 — Welding & Assembly

Cup bodies, handles and related components are welded and assembled according to the model design.

04 — Surface Finishing

Available processes include polishing, powder coating and other finishes according to the product and order requirements.

05 — Logo & Packaging

Logo methods and packaging are confirmed from approved artwork and samples before bulk production.

06 — Pre-Packing Inspection

Finished products are cleaned and checked for dimensions, welding, surface appearance, logo position and packaging before shipment.

Quality Control Before Shipment

Quality control is carried out throughout production and before packing. Checks are adapted to the product construction, finish, logo method and approved sample so that each order can be reviewed against confirmed requirements.

Material & Specification Verification

Material, capacity, construction, color and finish are checked against the approved order details.

Leakage & Functional Checks

Model-appropriate leakage, lid-fit and functional checks are carried out where applicable.

Dimensions & Workmanship

Key dimensions, cup shape, rims, bases, seams and assembly are inspected during production.

Surface, Color & Logo Checks

Surface finish, coating color, logo position and print clarity are compared with approved samples.

Welding & Handle Inspection

Welding positions, handle attachment and visible workmanship defects are checked where applicable.

Packaging & Quantity Verification

Inner packaging, carton marks, quantities and packing requirements are confirmed before shipment.

Testing & Compliance Support

Compliance requirements vary by product material, finish, intended use and destination market. RakaCups coordinates product-specific documentation and testing support according to confirmed order requirements.

Product Testing Support

FDA- and LFGB-related food-contact testing can be arranged for the applicable product, material and finish when required by the buyer.

Factory Social Compliance

The factory’s 2026 amfori BSCI audit renewal is currently in progress. Updated audit information will be available after completion.

Order-Specific Documentation

Available documents and test reports are confirmed for the specific product and order rather than presented as universal coverage for every item.

Factory & Quality Control Evidence

These photographs show selected areas of Yongkang Moka Metal Products Factory used for stainless steel drinkware production, assembly and inspection. Equipment and workflows may vary by product construction and order requirements.

Stainless steel drinkware production area at Yongkang Moka Metal Products Factory

Production & Forming Area

Equipment and workstations used to prepare and form stainless steel drinkware components.

Assembly and welding work is carried out according to the construction and approved sample of each model.

Welding & Assembly

Assembly and welding work is carried out according to the construction and approved sample of each model.

Stainless steel drinkware cleaning and pre-packing inspection area

Cleaning & Pre-Packing Inspection

Finished products are cleaned and reviewed for workmanship, surface appearance, logo placement and packaging before shipment.

OEM Project Case Study

The full case study is now published separately. It documents how RakaCups developed a welded-insert and mechanical attachment for an approximately 50,000-piece custom wood-handle coffee mug project.

Custom double-wall stainless steel coffee mug prototypes with wooden handles and lid options

Project at a Glance

Client: Coffee chain brand (anonymous)

Product: Double-wall stainless steel coffee mug

Customization: Wooden handle and wooden lid

Order Quantity: Approximately 50,000 pieces

50,000-Piece Custom Wood-Handle Mug OEM Case Study

READ THE FULL OEM CASE STUDY

This project combined a double-wall stainless steel mug body, custom wooden handle and wooden lid for an anonymous coffee-chain buyer. The full case study covers the engineering decision, welded inserts, assembly method and quality-control focus.

Engineering Focus

The key engineering question was how to create a repeatable, inspectable handle connection without depending on adhesive alone.

How the Solution Was Developed

RakaCups coordinated the stainless steel and wooden-component development so the approved design could use welded metal inserts with a mechanical handle attachment.

Read the Full Case Study

View the complete project for the manufacturing challenge, assembly photographs, engineering outcome, inspection points and OEM buyer guidance.要不

Factory & Custom Manufacturing FAQs

Manufacturing for RakaCups projects in China is carried out by Yongkang Moka Metal Products Factory in Yongkang, Zhejiang. Raka Corporation Limited, Hong Kong, manages international sales, OEM/ODM communication and export coordination.

Checks are carried out throughout production and before packing. Depending on the product, they may include dimensions, welding and assembly, surface appearance, color, logo position, packaging and model-appropriate leakage or functional checks.

Product-specific food-contact testing can be arranged according to the product material, finish, intended use and destination-market requirements. Test reports apply to the specific tested product configuration.

The factory’s 2026 amfori BSCI audit renewal is currently in progress. Updated audit information will be available after completion.

Yes. Our R&D team works with manufacturing partners to improve product structures when standard solutions are not suitable. One example is the redesigned mechanical connection developed for a custom wooden-handle coffee mug project.

Discuss Your Custom Drinkware Project

Share your product concept, target quantity, customization requirements and destination market. Our team can review the project and provide recommendations for structure, production, testing and packaging.

REQUEST FACTORY & PROJECT INFORMATION

Custom Stainless Steel Drinkware Manufacturer

20+ Years · OEM & Private Label

Email: sales@rakacn.com

Tel & WhatsApp: +86 132 3589 4990 

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