1:Cooking helps preserve the vitamins, minerals, flavors, colours and textures of the food, which is often lost after boiling. 5:Rugged: It has a toughened glass cover, rivet handles for extra strength, and a packaged base for even heat distribution. 2:Versatile, sophisticated design-Tightly mounted glass lid seals tightly to seal moisture and food's natural juices, locking in flavor, texture and nutrition 3:Vent holes can release excess pressure. The steamer is not a pressure cooker, but the steam always creates pressure. Even on a small fire, water will continue to boil and generate steam. 4:With a striking mirror finish, the stainless steel looks great, and the kit can be used with any hob