Quality Control for Custom Drinkware Orders

Bluegreen In-House Manufacturing for Reliable Drinkware Solutions
Bluegreen controls the entire production process in-house, from material selection to final inspection, with quality checks guided by the approved sample and agreed inspection requirements for each wholesale tumbler order.
Step 1
Step 01
Raw Material Preparation
We select materials for each component according to the approved specification. Review the material grades and relevant test documentation for the selected product before production.
Step 2
Step 02
Tube Cutting & Forming
Stainless steel sheets are cut, shaped, and formed into inner and outer shells with precise dimensions, building a strong foundation for premium wholesale tumblers.
Step 3
Step 03
Welding & Vacuum Insulation
The inner and outer shells are welded together, then processed through vacuum insulation technology to improve heat retention for every insulated tumbler cup.
Step 4
Step 04
Surface Treatment
Each cup goes through polishing, powder coating, spraying, or printing to create smooth finishes, vibrant colors, and customized looks for brand-ready drinkware.
Step 5
Step 05
Quality Inspection
We inspect appearance, sealing, vacuum performance, and coating quality to ensure consistent standards before packaging every finished tumbler.
Step 6
Step 06
Packaging & Shipment
Products are carefully packed, labeled, and prepared for delivery, supporting efficient export service for global custom drinkware partners.
Our 4-Step Inspection Process
Rigorous quality control for every vessel. We don't just manufacture; we verify excellence.
Spectrometer Analysis
Spectrometer Analysis for Stainless Steel
1. IQC: Material Verification
We strictly control the source of our food grade stainless steel. Before entering our warehouse, every coil of raw material undergoes Spectrometer Analysis.
  • Composition Check: Check each stainless steel component against the material grade specified in the approved bill of materials.
  • Safety: Check materials against the approved bill of materials and destination-market requirements; review available declarations and test reports before shipment.
Learn more about our Factory Capabilities »
Vacuum Insulation Test
Vacuum Insulation Testing Line
2. 100% Vacuum Insulation Test
We test the vacuum insulation of every vacuum-insulated unit in-house. Customer sampling inspections are also carried out.
  • Method: Automated temperature sensing line.
  • Rejection Criteria: Any cup showing heat transfer to the outer wall is instantly rejected.
Review the test results against the agreed inspection requirements before shipment.
Coating Test
Cross-cut Adhesion Test
3. Coating & Logo Durability
For custom logo tumblers, destructive test results should be reviewed against the agreed acceptance criteria for the selected finish and logo process.
  • Cross-Cut Test: Verifying powder coating adhesion using industry-standard 3M tape protocols.
  • Dishwasher Test: Confirm whether the selected finish is intended for dishwasher use. Agree on the test conditions, cycle count and acceptance criteria before production.
FQC
Final Quality Control Check
4. FQC & Pre-Shipment
Our Final Quality Control follows the rigorous AQL 2.5 (Major) / 4.0 (Minor) standard. We thoroughly check packaging, barcodes, and cleanliness before your commercial orders leave the facility.
  • Drop Test: Simulating shipping impacts from a 1-meter height.
  • Leak-Proof Test: Check lid and seal performance using the leakage test method agreed for the selected configuration.
In-House Lab Testing Standards
Review inspection results against the approved sample and written specification before shipment.
Thermal Performance Test

Standard: BS EN 12546-1:2000

Procedure: Filled with 95°C water. After 24 hours, temperature must remain above 55°C (depending on capacity).

Material Composition Analysis

Focus: Validating stainless steel cups

Procedure: Check the material analysis results against the specified grade for each stainless steel component.

Quality Control: Quality control should be tied to the approved sample and written specification. Define the checks required for incoming materials, assembly, leakage, insulation where applicable, finish, logo, packaging and carton marks, then agree how inspection records and exceptions will be handled before shipment.

Coating Adhesion (Cross-Cut)

Standard:ISO 2409

Procedure: Cutting a grid pattern into the coating, applying tape, and removing. Grade 0 (no detachment) is required.

Leakage Proof Test

Frequency: Every applicable unit is tested in-house. Customer sampling inspections are also carried out.

Procedure: Agree on the test temperature, fill level, lid configuration, orientation, duration and acceptance criteria for the selected model before testing.

Send your message to us

No registration is required. Fill in your contact details below, and we will reply within 24 hours!

Discuss Your Drinkware Project

Don't just take our word for it. Experience the engineering standard behind our production firsthand.

  • Rapid Response (24h)
    Receive a personalized, comprehensive price quote for your wholesale purchasing project within one business day.
  • Physical Sample Evaluation
    Free samples can be arranged for evaluation; customers pay the shipping costs. Confirm the selected model, material grades and sample preparation time with our team.
  • Engineer-to-Engineer Consultation
    Discuss complex OEM/ODM specs and tooling feasibility directly with our technical team.
Request details and pricing

Name*

Email Address*

Phone / Whatsapp*

Message*