Baby loves them and so do we!
Our baby is 10 months now, she loves emptying the bigger cups then hitting them to make noise. She has used them with water too, emptying and filling them. I am sure this toy can be used for a while as, as another reviewer mentioned, the cups are volumetrically accurate. Great investment for a non-toxic toy!
Green toys are amazing
I will definitely buy Green Toys again. After a little research the company is doing a lot for the environment and their community. These stacking cups are great for my baby now at 7 months as she loves to knock them down. They will be handy for quite a while as I will be using them to 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.
bath time play
The cups are colorful, numbered, fun and keep little ones entertained.