The four bowls nest neatly together, with their wide rims forming a flat surface so you can stack other kitchen essentials on top. An innovative design ensures you won't have any trouble separating them again; just press down on the embossed dot and tilt up your selected bowl to get a grip on it. They're made of durable, BPA-free melamine, great for both mixing and serving, and can be easily cleaned in the dishwasher. A variety of sizes--with diameters ranging from 5.8 inches to 9.5 inches--means the bowls are suited for any number of uses. Do not microwave.