Vacuum Flasks & Thermos Online

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Frequently Asked Questions

What is the difference between a thermos flask and a vacuum flask?

Thermos flask and vacuum flask are the same. Vacuum flasks are commonly called thermos flasks. Thermal flasks consist of three layers of protection (inner, outer, and a layer of air or simply vacuum in some cases). The three layers keep liquids cold or hot by not letting the heat from outside enter the container.

How long does water stay hot for in a flask?

As a general rule of thumb, if you put a hot drink in a vacuum thermos and keep the lid closed, it should remain hot for at least 6 hours, although some cheaper models can only heat the drink for up to 2 hours. In addition to that, the rate of heat loss depends on the surface area, so the larger the thermos, the longer your water will stay hot.