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Rang Dong’s Thermo Flask Delivers Superior Heat Retention

June 14th, 2025

Model RD-2035 S1 produced by Rang Dong, Vietnam’s leading manufacturer of vacuum flasks, keeps beverages at the desired temperature for extended periods as thanks to the exceptional heat retention technology. Let’s explore the thermo flask’s general specifications, outstanding features and practical applications to see how it could best serve hot tea in winter or chilled drinks in summer. 

Model RD-2035 S1 flask is a perfect blend of timeless design, superior insulation, and practical functionality. Using durable materials with user-friendly features, Rang Dong makes the flask stands out as a must-have for everyday use and outdoor adventures alike. 

General specifications 

Rang Dong has combined classic aesthetics with modern technology in this flask model to deliver a stylish and practical solution for beverage storage.  

The model’s cylindrical design, inspired by vintage thermo flasks, features a durable tinplate body with customizable patterns and colors, making it both functional and visually appealing. 

 Picture Structure of Rang Dong’s thermo flask, model RD-2035 S1. 

The flask’s lid, made from silver-colored aluminum, serves a dual purpose as a drinking cup. Its aluminum and cork stopper ensures a secure seal, while the PVC gasket provides excellent resistance against leaks.  

The aluminum bottom is designed for skid resistance and is easy to disassemble for cleaning and maintenance. 

Exceptional features 

One of the most notable features of this thermo flask is its superior heat retention capabilities.  

Built with a high-quality glass refill, the flask efficiently keeps drinks hot for up to 12 hours, and cold for 24 hours. This feature makes it an excellent companion for both daily use and outdoor adventures. 

Picture 

Rang Dong's thermo flask is designed to give room for users to personalize the patterns and colors on the product. 

Besides, a sturdy hanger has enhanced the flask’s portability and convenience for carrying. Whether on hiking trips or picnics, users can bring along their favorite beverages effortlessly. 

Certified with LFGB and Substances of Very High Concern (SVHC) standards, model RD-2035 S1 meets international safety and environmental protection regulations. It has been exported to many Asian countries, earning a reputation for quality and durability. 

Applications 

Rang Dong’s thermo flask is a perfect accessory for convenient use on many occasions. 

For daily home and office use, it provides an excellent way to keep beverages like tea, coffee, and water at the ideal temperature throughout the day. For the morning start with a warm cup of coffee or daily hydration with cool water, users can find a pleasant drinking experience with this thermo flask. 

 Picture Rang Dong’s thermos flasks can be used for keeping beverages such as tea or coffee, apart from its initial task of storing boiling water. 

Outdoor enthusiasts will appreciate its portability and durability. During hiking, camping or a picnic, they can always get their hot or cold drinks within reach regardless of the weather conditions. 

It is also an ideal companion for long-distance travel. With its high heat retention and spill-proof design, the thermo flask helps users enjoy their preferred beverages without the need for frequent refills. Additionally, its vintage design and customizable appearance make it a thoughtful and stylish gift option for loved ones. 

Should you have any questions or request a quotation of Rang Dong products, please send us an email to: export@rangdong.com.vn      

Websites: en.rangdong.com.vn and vacuumflask.rangdong.com.vn. 

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