Materials that should not go into compost include: cooked food, meat, dairy products, fish, eggs, oil-based foods, plastics, batteries, paints, cleaning supplies, chemical pesticides, chemical fertilizers, animal bedding, diapers, sanitary napkins, cotton balls, tissues, styrofoam, balloons, condoms, tampons, toothpaste tubes, toilet tissue rolls, plastic wrap, aluminum foil, tin cans, glass bottles, metal utensils, and styrofoam.