Hands-on learning tools that enhance math and science lessons. The set of 5 cups includes 1/8 (29 ml), 1/4 (59 ml), 1/3 (79 ml), 1/2 (118 ml) and 1 (236 ml) measures, with an activity guide included. Each clearly marked piece is made of durable plastic for years of use. Size: 17.3 x 9.1 x 4.6 cm. Ages 5+.