Ceramic cup definitely. When you make a latte, there should be no need to stir, the foam will form a perfect cap on top of the latte if you use a wide, shallow ceramic cup. This allows the milk to combine well with the espresso and then you can cap it off with a bit of foam. For some reason, lattes in ceramic mugs like a just described actually taste better... creamier. I think science has something to do with it. I found a good page on how to make a latte: http://www.coffee-illuminated.com/espresso-drink-recipes.html
I just went in to a place that was serving coffee in the Bodum double wall glass. I have to say those things are the bomb! I'm seriously contemplating picking up a few for home use and maybe one for work. My coffee stayed hot all the way to bottom. I'm impressed! I want my drink served in a Bodum double wall glass now.