I just try to be careful when I go out to eat or running errands. However, since I live in Florida I have a tall kitchen trash bag folded flat and put into a sandwich size baggie that is kept in each of my handbags. I've had to use it on more than one occasion when it is raining. (It may look foolish but I don't care. Better that than a ruined bag that I have to look at..or never want to look at again)