We find this set really well-designed and functional; it includes everything you need to rinse, steam cook, serve, store, even re-heat rice or vegetables. A steaming basket/colander, steaming tray, serving/storage bowl, and snug-fitting lid make up the set. The basket and tray are made of stain-proof, food-safe silicone, and all the pieces are microwave and dishwasher safe, too. The bowl measures 8.25" in diameter and 5.5" high.