What Has It Got In Its Pocketses?

I have a friend that has a pocket of anti-reality in her car. She uses it to store soda and vitamin water and tea, mostly. She pulls them in from the future, pulls the potential of soda from reality. She says potential soda tastes better, anyway.
But sometimes she forgets to go back and pay for the potential soda later and gets thrown into a paradox. Of course, she may already be in a paradox, which is why she can pull them out of reality anyway.