You're right, Christopher, those are less convenient for the car, but more convenient if you are out shopping or something, and your hands are too full to lug the coffees and the shopping bags around. I meant to point that out in my earlier post, but I was just shaking my head at the previous responses that made it seem as though someone had invented an instrument to better remove the brains of kittens with.
They have probably been drinking way too much coffee.