Nope, no trash bag in my car (none in DH's truck either) as I think they look ugly. Any trash I have to throw out I put in the side pocket until I either get to a gas station or home and then I dispose of it properly. Even on vacations when we have trash we throw it away at a gas station, or fast food restaurant (when they have a trash container by the door) or take it into the hotel and throw it away there.