Prestige perssure cooker is a stainless.It is easy to use and easy to clean. Nothing will stick inside it.As it is a steel stainless pressure im very satisfy with this.The aluminius cooker are not good because it is not stainless and not easy to use also because every thing will stick to it and not easy to remove.When I start using perstige pressure cooker I reaslise that it is very good.And make my work easier also.Its lid is very good.It gives a good service to us.Iam using prestige cooker and making my work easier.Its style and design is very compatable.Its gives a long service.