Fix it now and mix it later with the Mixie Baby Formula Mixing Baby Bottle - 4oz. Perfect for parents on the go, this bottle features an air tight chamber inside the bottle that can hold up to four scoops of formula. Simply fill the chamber with formula, the bottle with water, and put in your diaper bag and leave. When your baby is ready to eat, all you have to do is push the button on the bottom to release the formula into the bottle. The inner compartment acts as an agitator as you vigorously shake the bottle so you don't have to worry about clumps in your baby's bottle. Sealed with a wide-neck, food-grade, stage one silicone nipple that is vented to minimize colic symptoms, this bottle is also BPA and PVC-free. Microwave and dishwasher safe, this bottle helps make feeding-on-the-go quick and simple.