Two thermal properties cause a liquid in a thermos to cool. 1)Conduction (the act of heat traveling through a material) and 2)convection (the act of heat loss due to air). Therefore, using a material with a low thermal conductivity between the inner wall of the flask and the outer wall will reduce Conduction (see link for more info). To reduce Convection you need to make sure the outside walls of the thermos do not have much heat (i.e. make the inner material have a low thermal conductivity). Also the temperature of the air surrounding the thermos also effects the heat loss.

trust

I should say so. But then again it depends on where you are. Because there are alot of other celebrity talk show hosts here in the UK.

By the looks of your list you have included everyone in the USA.

Good work.