Calphalon Premier space saving hard anodized nonstick cookware securely stacks to save 30% more space. Plus, the unique cookware design and flat glass covers stack and nest in any order. The durable, hard anodized construction allows for even heating with no hot spots and is dishwasher safe for easy cleanup. The 3-layer nonstick interior is durable enough to withstand metal spatulas, spoons and whisks. The Calphalon Premier space saving 4.5Qt soup pot and cover have 8" diameters and can stack with other 8" diameter products to save more space in the kitchen. Average space saved vs. Like non-stacking Calphalon cookware items cookware must have same diameter