You couldn't possibly set out on an expedition without a thermos flask.

TMWKE says the thermos flask is the greatest invention of all time.

Time to wash out the thermos flask and dust down that straw sombrero.

Equipment for ghost hunters: thermal underwear, very important; warm coat; thermos flask; patience; ghost.

I'm still not sure if I will chance the joke about the thermos flask.

He poured me some water out of a thermos flask.

I had a further five poured into my thermos flask.

Then I got the thermos flask and filled it and put it on the desk.

He made himself a cup of green tea from the lukewarm water in the thermos flask.

Borrowing Samuel's thermos flask was a bit risky.

He used to make it after supper and keep it for us in a great thermos flask.

There was coffee substitute in the thermos flask, cold cutlets, and vanilla pudding in the preserving jar.

Keith looked sharply up from the coffee, which he was pouring, she saw, from a thermos flask.

Soup, smoking hot from a thermos flask, chicken and salad, a shape of cream, and a fragrant pineapple.

I opened the window, drove to the next rest area, drained my thermos flask, and did ten sit-ups.

Folded down, the simple cylindrical shape of the HMX-Q10 looks a lot like a thermos flask or a flashlight.