I've been considering getting one of these or maybe a MSR Mugmate. The espresso serving is just too small for me.
Upto now I used to just use 3in1's then got a big coffee perculator for over fire. I have since also started using Lyons Coffee bags which are great for lightweight camping.
Well worth the buy Adz. Cotswold Outdoors have them in for £22.00
Once pressed, it leaves no grounds in the drink at all and stays warm for at least an hour.