as a teacher, I do not have the luxury of a quick coffee run midday. I rarely have time to even finish my coffee before it gets cold. hence the thermos. I got two this christmas but am seeing that there are many great options - some even allowing for a little personality, if desired.
I think my older sister drank out of this throughout most of her elementary school days. (remember the thermos that snapped into your lunchbox? some days it had soup, others milk.)
the cottage nest
tea drinkers, this one is fantastic. you can steep on the go. bah-rilliant.