Each cup includes an easy-to-read identifier with permanent markings that will never wear off. It's easy to find and use the size needed without struggling to open or close a connecting ring. The space-saving handle design includes strong magnets that stack and nest the cups tightly for easy storage. Made from one-piece brushed 18/8 stainless steel without any welds and plastic markers, Mrs. Anderson's Magnetic Measuring Cups are durable, stackable, and unbendable. Dishwasher safe for easy cleanup.