The progressive prep works BA-620 , is a 4-piece magnetic measuring cup set. Magnets hold these innovative cups together for organized storage. The curved shape makes for easy scooping. Set includes: 1/4 cup (50 ml), 1/3 cup (80 ml), 1/2 cup (120 ml), and 1 cup (240 ml) measurements. Easy to read standard and metric measurements. This product is dishwasher safe for effortless cleaning.