Beer Info FAQ

Why does my flask not stay hot?

Why does my flask not stay hot?

A thermos bottle/jug has two rigid walls - frequently glass - and a vacuum between them. Since a vacuum does not conduct heat, there is no path for heat, (or cold), to travel except the small area where the opening is, so they will hold hot or cold liquid a lot longer than any other type of insulation.

Can you put ice in a flask?

While thermos flasks are usually used to keep drinks like tea or coffee hot, a thermos flask does not keep its contents hot, per se. So you can put ice cubes into a thermos flask and they stay ice cubes for a couple of hours.