Food storage containers and lids with built-in vacuum pump Superior vacuum seal locks out air and moisture for longer freshness Pump to remove air, press and turn to seal, push-button to release vacuum Shatter/scratch-resistant containers Stackable for convenient storage Will not stain or absorb odors Store wet or dry foods Refrigerator, freezer and microwave-safe Dishwasher-safe National Sanitation Foundation (NSF) certified Includes two 16 oz. containers, two 32 oz. containers and 4 vacuum pump lids