OXO Good Grips Pop Containers� airtight, space-efficient design Keeps dry foods fresh and your cupboards organized-Convenient fill line makes it easy to store staples like cereal, flour, sugar, pasta, rice, coffee, nuts and snacks-Push The button to engage The airtight seal. The button doubles as a handle for The lid. for best results, always use The button to open and close. Do not carry Pop Containers by The lid