OXO POP Containers are airtight and space-efficient, making it easy to keep cereals and favorite snacks fresh and close at hand. The Containers have a unique push-button mechanism that creates an airtight seal with just one touch so mom has a free hand. The button also serves as a handle to lift off the lid. With their square and rectangular shapes, POP Containers make the most of any storage space, while their corners allow for easy pouring. The lid comes apart for thorough cleaning. All POP Containers are BPA, phthalate and PVC free.