Or, you know, you could take trash with you every time you leave the car like normal human beings who don't hoard garbage.
I mean, yeesh, people have their reasons for having a trash can in the car. I'm a take-your-shit-with-you kind of guy myself, but I don't have kids and I don't eat in the car. Sure, that makes me a superior human being, but I don't rub it in people's faces.
Being in the car for a few hours with an exposed banana peel isn't the greatest, regardless of what happens to it at the destination.