*Tempered Glass - The glass of the containers is tempered, Super resistant to thermal and mechanical shocks therefore more resistant and long-lasting than normal glass. *Water and Air Tight - On the Go snap lock lids to keep food fresher longer, no harmful chemicals. NoBPA, PVC, Lead, Phthalates *Eco-friendly & Infinitely Recyclable, Reduce the amount of plastic in our landfills by using glass. Glass can be recycled as many times as you can break it. Even better,Wean Green's glass is made out of recycled glass. *Kid proof glass, the easy snap lets your little one feel grown up, if they toss, do not worry it wont break easily. *Set contains 4 glass tubs, Capacity 5oz each or 148 mL aprox. 1 green, 1 blue, 1 purple, 1 Orange New in packaging