OXO Good Grips 20-Piece POP Container Sets airtight, stackable, space-efficient and now dishwasher safe design, makes it easy to keep your dry foods fresh and your pantry organized Push the button to engage the airtight seal. The button doubles as a handle for the lid Convenient fill line makes it a cinch to store pantry staples like coffee, cereal, flour, sugar, pasta, rice, dried beans, nuts and snacks For best results, always use the button to open and close. Do not carry POP Containers by the lid BPA free. Top-rack dishwasher safe.