I use a cup in my jock and I usually save those plastic drinking cups you get with a soda from a convenience store to drink beverages they are actually a glass I guess. Other then that a cup of coffee or tea.
Well said Deno - I gues Etc. Etc. is beyond some folks' scope.
I always drink hot from a mug - if it is cold I drink it in whatever it is served in, I guess. Though I like my beer from the bottle. Why dirty a glass? (obviously that excludes draught)