I'll admit, I kinda sorta want this for my desk.
Although, I kind of doubt it will work that well. I bought my mother a somewhat similar contraption, where you fill the top cup with butter (and garlic, if you'd like) to dip your lobster into... and I didn't think it kept the butter that warm. So, could it really keep a whole grande mocha warm through the morning court session? I'm not so convinced.