There's a moldy Grape Tomato/Strawberry in the middle of my pint!!!

It never fails, I scour the outside of the containers at the market and everything appears to be fresh and firm....Then I'm preparing a meal and there is almost ALWAYS at least one shriveled, molding, festering, and repulsive grape tomato or strawberry.....It's neighbors in the container appear to be healthy and edible, but I tend to discard them as well...often I'm tempted to dispose of the entire container.......How do you handle this matter????