A big dog is another matter entirely.
Styrofoam cups for your coffee are okay with small dogs in the car.
They are NOT okay when a big dog sits down on the center console on your styrofoam cup.
With a big dog, you MUST use more durable containers for your coffee. Or get used to cleaning sticky cofffee residue out of the center console, and doing without your caffeine fix.
I already knew this, but some lessons you have to learn more than once. Sigh.