Learning Resources Rainbow Fraction Liquid Measuring Cups. Make learning to measure easy and fun with the Rainbow Fraction Liquid Measuring Cups. These colourful, food-safe, dishwasher-safe, liquid measuring cups offer a hands-on way for children to learn measurement concepts such as volume, capacity, and fractions while cooking or engaging in imaginative play. Plus, the nesting design means they can double as a stacking toy. The cups are colour-coded to the Rainbow Fraction Teaching System – whole (red), half (pink), third (orange), and quarter (yellow), so its easy to find the right cup. Large, easy-to-read printing is scratch-resistant, and features imperial and metric measurements. Soft, easy-grip tops with pouring spouts and spill guards at the bottom prevent messes and keep the cups stable. The set includes 4 Measuring Cups (1 cup, 1/2 cup, 1/3 cup, 1/4 cup) and Activity Guide. Suitable for ages 3+