Frigo® Cheese Heads® Whole Milk String Cheese. Frigo® Cheese Heads® low moisture whole milk mozzarella cheese is creamy and delicious. Frigo Cheese Heads® string cheese is individually wrapped is the perfect snack for the on-the-go family! Use them to make easy homemade snacks like mozzarella sticks. Frigo Cheese Heads® String cheese snack makes every break time fun.