Airtight seal with the press of a button; Pop-up button serves as handle to lift off lid Modular stacking system for optimal countertop and pantry organization; Silicone gasket is dishwasher safe, hand wash other parts 4.0-quart Container is the ideal size for a 5 lb bag of flour or sugar Also great for use in the garage, sewing room, play room and more Square and rectangular shapes maximize space-efficiency Container corners allow for easy pouring