This is a set of 3 stainless steel canisters of sizes 1, 2 and 3 quarts. The canisters have an easy view window to see the contents of the container. The lids close securely and are air tight. The canisters can be stacked one within the other, when not used. Although the window looks nice, there is a possibility of powdered items getting into the gap between the container and the window joint, making it difficult to clean or causing it to leak. So I’d recommend using this set for items that are not in powdered form. They look stylish on the kitchen counter.