How many liters is the old-fashioned thermos for home use?

Household old thermos bottles are usually two liters.

The volume of the old thermos bottle is about 2 liters. One liter is equal to one cubic decimeter, two liters is about 4-5 pounds, 1 pound is equal to 454 grams, about 2000 ml, a little more than two liters. It can hold 2 kilograms of water.