I have an insulated coffee/hot drink container called a Bubba Bottle that fits well in a bottle cage. It works fine at keeping drinks hot during my commute but I don't use it much because it's hard to drink coffee unless you are stopped at a traffic light for a long enough time. Also, drinking coffee makes me sweat more unless it's really cold out. When I carry coffee in my Bubba Bottle, I usually arrive at work with a nearly full bottle, so it's hardly worth the extra weight. Most of the time, I drink a couple of cups at home and then a couple more once I get to work.