At one point in the desert after they have blown a flat tire, Deborah seemingly pulls an umbrella from the side of her car. This is a real feature of the modern Rolls Royce; Rolls Royce not only includes a slot in the door to store and dry an umbrella, each car comes with a specialty crafted umbrella. The umbrellas are manufactured by Rolls Royce and retail for $700 each.
Brenda's car appears to be a 2019 Rolls Royce Wraith.