Rang Dong’s Vacuum Flask Excels with Keeping Cold Ability
How long can a vacuum flask keep the drink cold? The tropical hot weather in Vietnam and people's increasingly active life means consumers become more dependable on hydration options. Having been committed to serving the community, Rang Dong, Vietnam’s leading manufacturer of vacuum flask products, has developed its water bottles with unique insulation and sophisticated construction to provide excellent heat retention. Let’s explore why the Hanoi-based company has become a reputable brand in thermal technology, from material selection to practical advantages for users.
When it comes to keeping a cold drink for an extended period, not all vacuum flasks can deliver a similar result. Rang Dong’s flask featuring the excellent keeping cold ability is the result of decades of research and innovation in thermal insulation. One insulated bottle model using stainless steel can keep drinks cold for up to 24 hours.
Designed to minimize temperature change over long periods, the company’s vacuum flasks are crafted with a double-walled, vacuum-sealed structure that effectively blocks external heat from entering.
When it comes to keeping a cold drink for an extended period, not all vacuum flasks can deliver a similar result. Rang Dong’s flask featuring the excellent keeping cold ability is the result of decades of research and innovation in thermal insulation. One insulated bottle model using stainless steel can keep drinks cold for up to 24 hours.
Designed to minimize temperature change over long periods, the company’s vacuum flasks are crafted with a double-walled, vacuum-sealed structure that effectively blocks external heat from entering.
Excellent heat retention
The secret behind the keeping cold ability of Rang Dong’s vacuum flasks lies in its thoughtful engineering.
The vacuum insulation layer eliminates heat transfer via conduction and convection.
The inner lining made of stainless steel or glass that resists temperature change.
A tightly sealed lid prevents warm air from entering, and cold air from escaping.
The inner reflective coating helps maintain internal coolness.
Each flask is made from premium stainless steel or sturdy glass, together with precisely fitted lids and environmentally responsible, food-safe ingredients. In addition to guaranteeing dependable performance, the manufacturer’s thoughtful material selection prioritizes user health and environmental sustainability first.
Rang Dong's vacuum flask is capable of keeping cold drinks for up to 24 hours.
Optimizing Flask’s Performance
In order to fully experience the impressive keeping cold ability of Rang Dong’s flasks, it is essential to use the product correctly and optimize its performance with a few simple techniques.
Pre-cooling
A flask should be pre-chilled for cold drinks. Before emptying the flask and adding the beverage, fill it with ice water and leave it for three to five minutes. This early step will help keep the cold beverage for a longer period by reducing temperature shock.
Maximum fill
It will remain colder for longer if more liquid is added. The temperature change is accelerated when there is too much air space in the flask because warm air can interact with the liquid. For the best insulation, always fill the flask as full as one can.
Consumers can put small ice cubes or frozen ingredients into Rang Dong’s flask
Using correct lid, seal tightly
Always make sure the lid – the genuine one made by Rang Dong - is securely shut. Slow air exchange from a loose cap can erode the vacuum barrier and let heat from the outside in. In order to improve thermal insulation, some models even include a gasket ring or a locking mechanism. Users can make the most of these features.
Storing in a cool place
Although Rang Dong’s flasks are designed to perform well in hot environments, placing the item in direct sunlight or inside a hot car can affect its cooling performance. For best results, keep the flask in a shaded area or inside an insulated bag once outdoors.
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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