thermos
thermos flask
vacuum flask BrE
vacuum bottle AmE

She was drinking hot coffee from a vacuum flask.

If you have access to such a system place the solid wax in a vacuum flask and pump it to a low pressure.

Batters returned with a vacuum flask and a packet for each of them.

It was cold and some of them took a drink from their vacuum flasks or bit into the chocolate ration.

The officer produced a vacuum flask and gave it to him.

If you can find vacuum flasks for coffee that would be a help.

The float balloon, with the vacuum flask attached, was also in sight.

It is then sealed inside the vacuum flask for several hours.

If you've got a vacuum flask fill it with coffee and make a few sandwiches.

Keep the mixture in a vacuum flask for 6-8 hours.