Rang Dong in 60-year development of vacuum flask production

The invention of vacuum flask

Vacuum flask, also known as thermos, now a popular home appliance and personal item, was invented by Sir James Dewar, a Scottish chemist and physicist,  in 1892 by improving Newton's calorimeter barrel. Inheriting the improvement, two German glassblowers, Reinhold Burger and Albert Aschenbrenner, commercialized Dewar's design in 1904. Since then various designs, colors and patterns of the product have been marketed to meet customer’s diverse demand.

History of Rang Dong’s vacuum flask

Since Rang Dong’s establishment in 1961, the vacuum flasks produced by the company have become an indispensable item in many families in Vietnam’s northern region and later, nationwide. “Rang Dong” is now a familiar and reliable brand in the country of more than 90 million people.

For the six decades of development, vacuum flasks of the Hanoi-based company have not only won heart of Vietnamese consumers, but also been shipped to more than 20 countries on a long stretch from Asia to Europe to South America. Destinations include Japan, Singapore, China, South Korea, Indonesia, France, Italy, countries in the Middle East, UAE, Egypt, Brazil, Argentina and Cuba.

Rang Dong has been supplying over 25 million units of vacuum flasks and refills each year to the domestic and foreign markets. Following significant investment, Rang Dong now produces vacuum flasks on modern automatic lines, starting from the initial stage of glass melting. The company uses highly efficient electric furnaces that emit no CO2, SO2 or dust into the environment. Other modern technologies have been applied, such as silver plating technology with absolute heat radiation, modern exhaustion stage, the making of metal and plastic outer cases as well as product design.

A number of outstanding characteristics help distinguish Rang Dong’s vacuum flasks from their industrial product peers.

1. Eco-friendly and safety for health

Vietnam’s leading manufacturer of vacuum flask products, Rang Dong has seriously taken  control of the product quality management, meeting strict European and Japanese requirements for health and safety.

The company’s compliance with the quality standards makes a great advantage amid the fierce competition on the thermos market, especially among stainless steel products. Unlike other materials, Rang Dong’s neutral glass used for the glass refill in vacuum flasks does not generate substances harmful to the human body. 

• Rang Dong adopts the use of high-borate glass that helps increase the strength and thermal shock resistance versus ordinary glass. Silver plating technology is applied with absolute heat radiation to ensure high heat retention and prevent oxidation.
• By using state-of-the-art glass melting technology with the most advanced electric boosting furnace, Rang Dong ensures that its manufacturing process does not emit CO2, SO2 and dust into the environment.
• The company’s products are certified by Vietnam’s Ministry of Health on food safety and in accordance with European safety standards LFGB (Germany), REACH as well as Japan’s environmental safety standards.

Rang Dong’s neutral glass used for the glass refill, a key part in of the vacuum flask, does not generate substances harmful to the human body.

2. Key advantage points

• Using food safety glass refill with high heat retention in compliance with European and Japanese standards;
• Using high-quality outer case including Premium PP plastic, silicone and TPE gaskets certified by SGS on health safety and of durability; Anti-rust and durable ornamental steel and high-grade stainless steel;
• Design with registered industrial copyright and patents;
• Applying quality management system in accordance with British Standard BS EN 12546-1:2000, meeting European and Japanese standards on safety.

Finished products of Rang Dong’s vacuum flask in storage

3. Convenient use, diversified styles and reasonable prices

The vacuum flask makes it convenient to mix medicinal herbs, herbs for health benefits or common drinks: Ganoderma, jiaogulan, artichoke, ampelopsis cantoniensis, solanum procumbens, chlorophyll, coffee, milk, juices, etc.

• Able to keep the drink at the optimal temperature of up to 80 degree C after six hours; Suitable with students, office staff; Convenient for picnics, travel.
• Decorative as it comes with various designs, colors and vibrant patterns so it is suitable to be put on display at various places.
• Reasonable: Consumers may purchase Rang Dong thermos without having to think of the price as the company’s mass production, its application of cutting-edge technology and automatic production lines help ensure the product’s best quality at the most preferential price. Rang Dong has targeted its products to become customer’s indispensable personal item.

Development orientation

The company, Vietnam’s leading manufacturer of vacuum flask products, has projected to expand exports to highly demanding markets like the United States and European countries.

On the way to approach these markets, Rang Dong aims to develop and cooperate with famous brands such as Thermos, Tiger, Emsa, Hovac, Aladdin, Invicta and Termolar via large E-commercial marketplaces at home and abroad, including Alibaba, Amazon, Lazada and Shopee. In order to penetrate these markets, Rang Dong has been constantly raising its advantage points in order to gain customers' trust by the compliance with a variety of quality standards in domestic and international markets.

Armed by a long-term vision and a sustainable development strategy, Rang Dong expects to always keep customers satisfied with extremely high-quality products.

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

Rang Dong's vacuum flasks are trusted and selected by many domestic and foreign consumers.