Green Toys™ Stacking Cups feature six graduated cups that offer dozens of possibilities for bath and play time. Scoop and pour water, build towers by turning upside down, or just sort sizes to nest. The My First Green Toys™ Stacking Cups are colorful and fun, and teach basic counting and math concepts. Each cup is numbered on the bottom from 1 to 6 and is volumetrically accurate. Fill cups 1 and 2, for example, and it will equal the volume of cup 3. Made in the USA from 100% recycled plastic milk containers. Perfect for home, classroom, outdoors, or the tub. No BPA, PVC, phthalates, or external coatings. Meets FDA food contact standards. Dishwasher safe. Color combinations may vary. Cup diameter ranges from 1 1/2" to 3 1/2" diameter. Stacks to 4 3/4" H. For ages 6 months and up.