Hard Plastic CEREAL BOWLS, TUMBLERS / CUPS, PLATES, SERVING BOWLS (Cereal Bowls 5"x5" 18oz (4 pack), blue) Cereal Bowls: 4 pack 5"x5", 18oz Tumblers/Cups: 4 pack 9oz, 4" high Plates: 9"x9" Serving Bowls: set of 3 asst sizes Microwave-safe; heat food up to 200F. Dishwasher-safe. Polypropylene