The happy mummy baby cubes stage 3 is ideal for storing snacks or carrying food when baby and you are out and about the tray is a non toxic plastic with 4 individual 140ml containers to store baby food or milk and has an air tight and flip top snap closed lid to stop leakages and keep food fresh for longer each cube is stackable for easy storage and has and the food portions are safe to put in the dishwasher and the microwave and they are also steriliser safe