The colourful, fun My First Green Toys Stacking Cups help teach kids basic counting and math concepts. Volumetrically accurate cups are numbered from 1 to 6. For example, fill cups 1 and 2 to equal the volume of cup 3. Green Toys are made in the USA from 100% recycled plastic milk containers that save energy and reduce greenhouse gas emissions. Perfect for home, classroom, indoors, outdoors and in the tub. No BPA, PVC, phthalates, or external coatings. Meets FDA food contact standards, and dishwasher safe. The colour combinations may vary.