This Stainless Steel Pressure Cooker / Canner is user-friendly and constructed with modern technology. The lid-locking system is patented. It is made of 18/10 heavy gauge stainless steel with a solid thermal aluminum 3-layer sandwish bottom for even browning and rapid heat absorption. This pressure cooker will cook with less loss of vitamins, minerals and proteins than other cooking methods. It also preserves the color and texture of vegetables unlike microwave cooking.