Does putting hot water in a thermos bottle before you put hot coffee in it help to keep temperature?

Filling the bottle with hot water immediately before use pre-warms the bottle, because heat is transferred from the hot water to the bottle (and in the transfer, the hot water naturally cools a little). This readies the bottle for filling with hot coffee and because the bottle is already pre-warmed, it takes little or no heat from the coffee thus keeping the coffee closer to the temperature that it was when the flask was filled.