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Rang Dong – Vietnam’s Leading Vacuum Flask Manufacturer

October 2nd, 2023

For decades vacuum flask has been popular in many Vietnamese families. Its market has seen more competition, joined by new domestic manufacturers, and also from the penetration of foreign brands. With unrelenting efforts, Rang Dong has done much, and will have to do more in order to retain its leading position among vacuum flask manufacturers in Vietnam.

Rang Dong’s operation

Rang Dong runs two production facilities in Hanoi, Vietnam’s capital.


Rang Dong has been operating two factories, one in Hanoi on an area of 57,000 square meters, and another in the neighboring province of Bac Ninh with the total area of 82,000 square meters, employing a combined 2,180 people. Now capable of turning out 18 million vacuum flasks and 23 million glass refills per year, Rang Dong has been outperforming its industrial peers.

Mission – Vision - Core value

Established in 1961, the Hanoi-based company defines corporate culture and engages employees by the meaning of mission, vision and core value.

Mission: Rang Dong is set to supply eco-friendly, safe vacuum flask products and services to  protect human health, ensuring happiness and improving the quality of life, while adding value for shareholders, employees and customers. The company is dedicated to serve customers.

Vision: Rang Dong has set a vision to become the world’s leading enterprise in its field, a pioneer in supplying vacuum flask products and services to meet customers’ demands at home and abroad by 2030.

Core value: The company’s core values are Unity, Discipline, Professionalism, Continuous Innovation and Improvement, Honesty.


Mastering technology

With more than 60 years of experience in vacuum flask manufacturing, Rang Dong is proud to state that it is confident in mastering technology.

Rang Dong has mastered and been applying accurate and modern technology for its production.

Production lines: One Auto-Line of 2L type using Bottom sealing technology, with an annual capacity of over 7 million pieces; Two lines of Waist Sealing Technology that could customize shape, dimension and capacity, with an annual output of over 16 million pieces.

Plastic Injection: A total of 67 machines are capable of turning out 100 to 650 tons of various products.

Rollers: Accompanied by modern equipment, ensuring stable quality and high productivity; The annual output is over 3 million pieces.

Assembly lines: Four lines, each capable of churning out over 8 million pieces per year.

Quality Management System: Rang Dong applies a strict quality control system (IQC, PQC, OQC) with modern equipment and methods, including: 

  • The advanced quality management system according to the European model EFQM. 
  • Environmental management system ISO 14001: 2004. 
  • Deploying production of LEAN, 6 sigma, 5S, Kaizen, TPM of Japan. 
  • Investing in a modern equipment system for quality control. 
  • Testing laboratory conforming to national standard ISO / IEC 17025: 2005.

Finished vacuum flasks must meet quality standards. The full size of the final product must comply with the approved design specification. The actual measured capacity of a bulb should not exceed six percent of the nominal capacity value. Vacuum flasks are guaranteed with no water leakage.

Rang Dong’s thermoses must be balanced when standing on any 10-degree surface while holding any amount of water inside. Heat retention must reach the time requirement of six hours at least for hot liquids, and 24 hours for cold stuff. All the vacuum flasks go through a thermal shock test before stocking and release.

Outstanding products

As the leading all-in-one vacuum flask manufacturer, Rang Dong has its product range covering all consumer needs such as air pot vacuum flask, teapot vacuum flask, hand-held thermos, coffee pot thermos, family vacuum flask etc.

Rang Dong makes a range of vacuum flasks suitable for keeping various types of drinks.

Export network

Rang Dong’s vacuum flasks have been exported to over 22 countries around the world including South Korea, Singapore, Canada, England, France, Italy, Egypt, Saudi Arabia, Sudan, Jordan and Iran. 

Key Partners

Rang Dong has been cooperating with well-known key partners for the supply of components and full or partial production of vacuum flasks such as Thermos, PMI, Termolar, Soprano, Tomic, Tiger and Invicta.

Awards and Media recognition

Rang Dong is proud to be honored as Vietnam’s leading vacuum flask manufacturer by the Vietnam Rank Report. The company’s vacuum flasks account for 85 percent of Vietnam’s market. Its brand has become a Vietnamese reputable indispensable brand. As the No. 1 vacuum flask manufacturer in Vietnam, Rang Dong is ready to enter and develop a reliable partnership in vacuum flask production with companies at home and abroad.

Should you have any questions, wish to share your ideas about vacuum flasks or request a quotation, please send us an email to: export@rangdong.com.vn.

Our website: vacuumflask.rangdong.com.vn

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