Here may be the root of the problem. If you mess around with small, designer coffee cups then the temperature soon falls off. A proper mug will hold enough heat to allow the brew to be fully enjoyed over a decent period of minutes.
One of these...
View attachment 152985
NOT one of these...
View attachment 152986
Harsh, Moi?
No no no. It is all about heat capacity, not heat retention or shunning of tradition. Heat retention is moot because the heat escapes most from the top, which cannot be stopped unless you put your coffee in a sippy cup.
The heat capacity of a large mug is far to high and will sap half the coffee's temperature within seconds. Of course, if you do as
@Cubist suggests, then heat capacity works in your favour. But then you have to heat the cups before making coffee. Also, in that case, the latter designer cup will work better because it has thick walls and a very high heat capacity and small surface area. Also, The Tassimo type machines only brew about 70ml at most, so a large cup is an extra burden on the little bit of heat contained in that volume of water.
C'mon guys, coffee is religion, stop messing around.