OXO ® POP 40-Piece Complete Pantry Container Set. Plastic, silicone Push-button open and close Stackable Top rack dishwasher-safe Outfit your entire pantry with this set of airtight containers. Clear plastic vessels make it easy to identify contents and the ingenious lid creates a protective seal. Simply press the button on the lid to create a seal. To release the seal, press the button again. The rounded corners pour cleanly, and the lidded vessels stack neatly for flexible, accessible storage.